Term
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Definition
__ cells have a membranous nucleus and other membrane-bounded organelles, such as mitochondria, the Golgi apparatus, and chloroplasts |
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Term
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Definition
eukaryotes have a __ comples cellular structure in comparison to prokaryotes |
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Term
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Definition
__ is a convenient term that means “eukaryote that isn’t a fungus, animal or plant |
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Term
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Definition
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Term
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Definition
Most eukaryotic lineages are __ |
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Term
unicellular multi-cellular |
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Definition
protists are usually __ or form small __ colonies |
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Term
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Definition
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Term
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Definition
protists mostly occur in __ |
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Definition
protists have __ and __ reproduction |
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Definition
protists possess specialized __ |
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Definition
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Term
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Definition
Single-celled protists are considered the __ eukaryotes |
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Term
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Definition
Unicellular protists carry out essential biological functions using __ |
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Term
photoautotrophs heterotrophs mixotrophs |
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Definition
Some protists are __ and contain chloroplasts Some protists are __, absorbing organic molecules or ingesting larger food particles Some protists are __, combining photosynthesis and heterotrophic nutrition |
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Term
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Definition
Protist diversity originates in __, the process in which certain unicellular organisms engulf other cells, which become endosymbionts and ultimately organelles in the host cell |
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Term
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Definition
Photoautotrophs are __ , they have chloroplasts |
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Term
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Definition
cholorplasts are a class of __ |
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Term
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Definition
plastids are major organelles found in __ and __ |
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Term
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Definition
__ = heterotrophs - food particles: animal-like (ex: protozoa) |
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Term
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Definition
__ = heterotrophs - organic molecules: fungus-like (ex: oomycetes + others) |
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Term
photosynthetic/heterotrophic |
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Definition
__ = mixotrophic - animal/plant like (ex: Euglena) |
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Term
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Definition
__ can switch to heterotrophy in absence of light |
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Term
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Definition
In the __, small prokaryotes enter host or are engulfed prey or parasites. the host gains a selective advantage. the host an endosymbionts become a single organism |
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Term
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Definition
One lineage of heterotrophic eukaryotes acquired an additional endosymbiont – a photosynthetic __ – that then evolved into plastids, which eventually gave rise to red algae and green algae |
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Term
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Definition
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Term
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Definition
Mitochondrial DNA very similar to DNA of some __ |
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Term
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Definition
Plastids evolved into plastids by __ endosymbiosis and __ endosymbiosis |
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Term
cyanobacteria engulfed by ancestral heterotroph and gave rise to green algae and red algae |
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Definition
the primary endosymbiosis that evolved plastids was what |
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Term
the red algae and green algae were engulfed by other heterotrophs and became endosymbionts themselves |
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Definition
the secondary endosymbiosis that evolved plastids was what |
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Term
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Definition
plastid __ and __ is similar to cyanobacterium |
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Term
cyanobacterium in primary endosymbiosis algal membrane food vacuole |
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Definition
there are 4 membranes to plastids: 2 from inner/outer cell membranes of __, the 3rd from engulfed __, and the 4th from heterotrophic __ |
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Term
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Definition
plastids contains a __ nucleus called a nucleomorph (lost to varying degrees in other lineages) |
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Term
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Definition
the early branching order in the eukaryotic tree is not yet resolved. there is possibly no single __ which means that there could be multiple origins from different bacterial groups |
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Term
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Definition
_ – a recently proposed clade that has emerged from morphological studies of the cytoskeleton |
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Term
“excavated” feeding groove |
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Definition
Some members of Excavata have an __ on one side of the cell body |
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Term
diplomonads parabasalids euglenozoans (each group is monophyletic) |
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Definition
The excavates include the __, the __, and the __ |
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Term
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Definition
Protists in the diplomonads and parabasalids lack __ and have modified __ |
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Term
DNA, electron transport chains, or citric acid cycle enzymes |
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Definition
the diplomonadida and parabasala mitochondia do not have what? |
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Term
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Definition
protists in the diplomonads and parabasalids are found in __ environments |
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Term
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Definition
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Term
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Definition
__ = a protist that has modified mitochondira, two equal sized nuclei, and multiple flagella |
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Term
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Definition
diplomonad that inhabits the intestines of mammals. it can infect people when they drink water contaminated with feces containing the cysts of the parasite. drinking such water can cause severe diarrhea |
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Term
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Definition
__ the water kills the parasite giardia intestinalis |
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Term
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Definition
lifecycle: trophozoites - __ = (not resistant outside the host). __ = (resistant outside the host |
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Term
Giardia intestinalis Excavates --> Diplomonads --> Giardia intestinalis |
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Definition
Most common cause of non-bacterial gastroenteritis |
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Term
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Definition
chlorine __ spores. Iodine __ spores |
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Term
euglenozoans Excavata --> euglenozoans |
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Definition
__ = member of diverse clade of flagellated protists that includes predatory heterotrophs, photosynthetic autotrophs, and pathogenic parasites |
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Term
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Definition
the Euglenozoans mode of locomotion is __ |
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Term
trypanosoma --> Excavata --> Euglenozoans --> Kinetoplastids --> trypanosoma |
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Definition
__ causes sleeping sickness via tsetse flies |
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Term
euglena Excavata --> euglenozoans --> euglenids --> euglena |
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Definition
__ = mixotrophs that in sunlight are autotrophic, but when sunlight is unavailable, they can become heterotrophic, absorbing organic nutrients from their environment. they are found in pond water |
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Term
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Definition
_ – has a pocket at one of the cell from which one or two flagella emerge. it also lacks cell walls |
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Term
eyepot light detector pellicle |
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Definition
a euglenid has an __ which is a pigmented organelle that functions as a light shield, allowing light from only a certain direction to strike the light detector. it has a __ which is swelling near the base of the long flagellum; detects light that is not blocked by the eyespot; as a result euglena moves toward light of appropriate intensity, an important adaptation that enhances photosynthesis. it also have a __ which are protein bands beneath the plasma membrane that provide extra strength and flexibility |
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Term
Chromalveolata (the Chromalveolates) |
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Definition
__ – a large, extremely diverse clade of protists that has recently been proposed based on two lines of evidence: 1) some (though not all) DNA sequence data suggest that the chromalveolates form a monophyletic group. 2) some data support the hypothesis that the chromalveolates originated more than a billion years ago, when a common ancestor of the group engulfed a single-celled, photosynthetic red alga |
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Term
Alveolates Chromalveolata --> Alveolates |
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Definition
__ have alveoli (small membrane-bound sac) under plasma membrane |
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Term
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Definition
Function of alveoli = __; hypothesized that they may help stabilize the cell surface or regulate the cell’s water and ion content |
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Term
dinoflagellates apicomplexans ciliates |
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Definition
The alveolates include 3 subgroups: a group of flagellates (the __), a group of parasites (the __), and a group of protists that move using cilia (the __) |
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Term
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Definition
__ – characterized by cells that are reinforced by cellulose plates (cellulose armor plating) and have two flagella located in perpendicular grooves that make them spin as they move through the water |
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Term
unicellular phytoplankton community |
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Definition
Dinoflagellates are usually __. they are abudant components of the marine and freshwater __ |
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Term
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Definition
Dinoflagellates __ – episodes of explosive population growth – sometimes cause a phenomenon called “red tide” in coastal waters. they appear brownish red or pink because of the presence of carotenoids, the most common pigments in dinoflagellate plastids |
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Term
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Definition
Some dinoflagellates are also bioluminescent because of the enzyme __ |
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Term
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Definition
Nearly all __ are parasites of animals (some cause serious disease) |
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Term
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Definition
__ is caused by an apicomplexan protist |
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Term
sexual asexual two or more diploid haploid |
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Definition
apicomplexan protists are parasitic, they have intricate life cycles with both __ and __ stages. Their life cycles often require __ host species for completion. they also have __ and __ stages |
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Term
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Definition
The apicomplexan parasites spread through their host as tiny infectious cells called __ |
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Term
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Definition
__: invade liver of host, multiply, and metamorphose to merozoite stage. |
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Term
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Definition
__: invade RBCs, multiply. Emerge in waves to : 1. infect new RBCs. 2. produce eggs and sperm |
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Term
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Definition
in the life cycle of Plasmodium, the apicomplexan that causes malaria, the eggs and sperm are taken in by the mosquito. fertilization occurs __ the moquito and it produces a __ zygote. the zygote undergoes __ to produce the haploid sporozoites. mosquito bites a new host and the cycle is completed |
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Term
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Definition
500 million clinical cases & 2-3 million deaths per year mostly in __, when they get malaria |
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Term
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Definition
large, varied group of protists named for their use of cilia to move and feed |
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Term
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Definition
Distinctive feature of __ = presence of two types of nuclei: tiny micronuclei and large macronuclei. A cell has one or more nuclei of each type |
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Term
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Definition
the ciliates __ controls everyday function, asexual reproduction |
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Term
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Definition
the ciliates __ are Required for sexual repro |
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Term
Stramenopiles Chromalveolata --> Stramenopiles |
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Definition
__ are a group of marine algae that include some of the most important photosynthetic organisms on the planet, as well as several clades of heterotrophs. they have characteristic flagellum, which has numerous fine, hairlike, projections |
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Term
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Definition
__ – protists that have a single, large mitochondrion that contains an organized mass of DNA called a kinetoplast |
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Term
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Definition
Stramenopiles have characteristic __, which has numerous fine, hairlike, projections |
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Term
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Definition
__ – unicellular algae that have a unique glass-like wall made of hydrated silica (silicon dioxide) embedded in an organic matrix |
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Term
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Definition
The diatoms wall consists of __ parts that overlap and provide effective protection from predators |
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Term
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Definition
Much of the diatoms strength comes from the delicate lacework of holes and grooves in their __ |
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Term
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Definition
Most of the year, diatoms reproduce __ by __; each daughter cell receives half of the parental cell wall and generates a new half that fits inside it. Some species form __ as resistant stages |
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Term
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Definition
Sexual reproduction occurs but __ common in diatoms |
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Term
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Definition
Diatoms are a highly diverse group of protists. They are a major component of __ both in the ocean and in lakes |
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Term
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Definition
Diatoms store energy in the form of a glucose polymer called __ |
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Term
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Definition
Massive accumulations of fossilized diatom walls are major constituents of the sediments known as __, which is mined for as its quality as a filtering medium for many other users |
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Term
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Definition
When diatoms build their shells, they perform intricate, 3-D self-assembly of __ components |
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Term
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Definition
Diatoms help the field of __ – the fashioning of microscopic devices |
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Term
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Definition
Characteristic color of golden algae is from their __ and __ carotenoids |
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Term
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Definition
Cells of golden algae are typically __, with both flagella attached near one end of the cell |
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Term
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Definition
Many golden algae are components of freshwater and marine __ |
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Term
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Definition
All golden algae are __, some species are mixotrophic |
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Term
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Definition
The mixotrophic golden algae can absorb dissolved organic compounds or ingest food particles by __ |
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Term
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Definition
Most golden algae species are __, but some are colonial |
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Term
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Definition
If environmental conditions deteriorate, many golden algae species form protective __ that can survive for decades |
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Term
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Definition
The largest and most complex algae are __ algae |
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Term
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Definition
Brown algae are all __, and most are marine |
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Term
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Definition
Brown algae are common along __ coasts, where the water is cool |
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Term
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Definition
Brown algae’s color comes from their __ in their plastids |
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Term
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Definition
Many of the species commonly called __ are brown algae |
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Term
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Definition
__ – an algal body that is plantlike, but it lacks true roots, stems, and leaves |
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Term
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Definition
Brown algae seaweeds have unique adaptations, their cell walls are composed of __ and __ polysaccharides that help cushion the thalli from waves and reduce drying when the algae are exposed |
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Term
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Definition
Brown algae are important commodities for __ |
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Term
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Definition
__ include water molds, the white rusts, and the downy mildews |
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Term
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Definition
oomycetes were previously classified as __ |
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Term
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Definition
Many oomycetes have multinucleate filaments (__) that resemble fungal hyphae |
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Term
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Definition
Oomycetes typically have cell walls made of __, the walls of fungi consists mainly of another polysaccharide, __ |
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Term
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Definition
In both __ and __, the high surface-to-volume ratio of filamentous structures enhances the uptake of nutrients from the environment |
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Term
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Definition
Although oomycetes descended from plastid-bearing ancestors, they no longer have plastids and __ perform photosynthesis |
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Term
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Definition
Oomycetes typically acquire nutrients as __ or __ |
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Term
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Definition
Most __ are decomposers that grow as cottony masses on dead algae and animals, mainly in freshwater habitats |
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Term
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Definition
White rusts and downy mildews generally live on land as __ |
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Term
Irish potato famine of the 19th century |
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Definition
oomycete phytophthora contributed to the devastating __ |
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Term
foraminiferans, or forams |
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Definition
Protists called __, are named for their porous shells, called tests |
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Term
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Definition
Foram tests consist of a single piece of organic material hardened with __. Pseudopodia extend through the pores and function in swimming, test formation, and feeding |
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Term
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Definition
Forams also derive nourishment from the photosynthesis of __ that live within the tests |
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Term
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Definition
Forams are found in both the __ and __ water |
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Term
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Definition
_ of all identified species of forams are known from fossils |
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Term
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Definition
the fossilized tests of forams are part of marine sediments, including sedimentary rocks that are now __ |
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Term
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Definition
Protists called __ have delicate intricately symmetrical internal skeletons that are generally made of silica |
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Term
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Definition
Radiolarians are mostly __ protists |
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Term
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Definition
The __ of radiolarians radiate from the central body and are reinforced by bundles of microtubules |
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Term
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Definition
The microtubules of radiolarians are covered by a thin layer of cytoplasm, which engulfs smaller microorganisms that become attached to the pseudopodia. __ then carries the captured prey into the main part of the cell |
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Term
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Definition
After radiolarians die their skeletons settle to the seafloor, where they have accumulated as an __ |
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Term
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Definition
Many of the species of red algae are reddish, owing to a photosynthetic accessory pigment called __, which masks the green of chlorophyll |
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Term
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Definition
Red algae species adapted to more shallow water have less phycoerythrin and therefore may be a __ color |
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Term
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Definition
Red algal species may be bright red at moderate depths and almost black in __ water |
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Term
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Definition
Some red algal species lack pigmentation altogether and function ___ as parasites on other red algae |
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Term
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Definition
__ algae are the most abundant large algae in the warm coastal waters of tropical oceans |
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Term
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Definition
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Term
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Definition
The thalli of many red algae are __, often branched and interwoven in lacy patterns. The base of the thallus is usually differentiated as a simple holdfast |
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Term
alternation of generations |
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Definition
Red algae have especially diverse life cycles, and __ is common |
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Term
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Definition
Unlike other algae, red algae have no __ in their life cycle and depend on water currents to bring gametes together for fertilization |
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Term
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Definition
Green algae and __ are closely related |
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Term
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Definition
Green algae are a __ group |
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Term
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Definition
Green algae are divided into two main groups, __ and __ |
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Term
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Definition
Most chlorophytes live in __, but there are also many marine and some terrestrial species |
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Term
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Definition
The simplest chlorophytes are __ organisms. Various unicellular chlorophytes exist as plankton or inhabit damp soil. Some live symbiotically within other eukaryotes, contributing some of their photosynthetic output to the food supply of their hosts |
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Term
1. The formation of colonies of individual cells, as seen in Volvox and in filamentous forms that contribute to the stringy masses known as pond scum, 2.The formation of true multicellular bodies by cell division and differentiation, as seen in the seaweed Ulva, 3. The repeated division of nuclei with no cytoplasmic division, as seen in the multinucleate filaments of Caulerpa |
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Definition
Larger size and greater complexity evolved in chlorophytes by what three different mechanisms? |
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Term
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Definition
most chlorophytes have complex life cycles, with both __ and __reproductive stages |
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Term
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Definition
nearly all chlorophytes reproduce sexually by means of __ that have cup-shaped chloroplasts |
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Term
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Definition
alternation of generations has evolved in the life cycles of chlorophytes, including Ulva, in which the alternate generations are __ |
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Term
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Definition
the other main group of green algae, the charophytes, are the algae most closely related to __ |
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Term
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Definition
brown algae is used as __: thickening and emulsifying agents in food and cosmetics industry |
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Term
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Definition
Foramenifera are important source of _ |
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Term
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Definition
red algae can photosynthesize at __ depths |
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Term
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Definition
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Term
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Definition
__ - closely related to fungi & animals, they include amebozoans |
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Term
alternation of generations |
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Definition
the alternation of multicellular haploid and diploid forms; applies only to life cycles in which both haploid and diploid stages are multicellular |
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Term
alternation of generations |
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Definition
1. The sporophytes are usually found in water just below the line of the lowest tides, attached to rocks by branching holdfasts 2. Cells on the surface of the blade develop into sporangia 3. Sporangia produce zoospores by meiosis 4. The zoospores are all structurally alike, but about half of them develop into male gametophytes and half into female gametophytes. The gametophytes are short, branched filaments that grown on subtidal rocks 5. Male gametophytes release sperm, and female gametophytes produce eggs, which remain attached to the female gametophyte. Eggs secrete a chemical signal that attracts sperm of the same species, thereby increasing the probability of fertilization in the ocean 6. Sperm fertilize the eggs 7. The zygotes grow into new sporophytes while attached to the remains of the female gametophyte |
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Term
organic material recycle nutrients |
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Definition
fungi break down __ and __, allowing other organisms to assimilate essential chemical elements |
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Term
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Definition
the kingdom __ is the neglected kingdom |
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Term
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Definition
__ have an enormous biomass |
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Term
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Definition
Honey fungus. Single organism: giant subterranean network of hyphae. Very large and old |
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Term
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Definition
fungi have enormous species diversity with __ species described and have an estimated __ species |
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Term
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Definition
fungi have no chlorophyll, no fixing of carbon from C02 so they are therefore __ |
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Term
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Definition
in fungi, Enzymes digest food outside body (__ heterotroph) |
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Term
Decomposers (saprobes), Parasites, Mutualistists |
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Definition
the Lifestyles of fungi are what? |
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Term
unicellular and multicellular |
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Definition
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Term
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Definition
an examples of single celled fungi is __ |
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Term
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Definition
__ reproduction in yeasts occurs by ordinary cell division or by the pinching of small “bud cells” off a parent cell |
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Term
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Definition
__ – filamentous cell: absorb nutrients. non-motile – form fast-growing mass |
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Term
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Definition
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Term
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Definition
Fungal cell walls are strengthened by __ - strong, flexible, nitrogen-containing polysaccharide |
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Term
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Definition
Mycelium’s structure __ its surface area-to-volume ratio, making feeding more efficient. Fungal mycelium grows rapidly, as proteins and other materials synthesized by the fungus are channeled through cytoplasmic streaming to the tips of the extending hyphae |
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Term
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Definition
In most fungi, the hyphae are divided into cells by cross-walls, or __ |
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Term
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Definition
Septa have pores that allow ribosomes, mitochondria, and even nuclei to flow from __ |
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Term
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Definition
•Some fungi lack septa and are known as __ fungi |
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Term
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Definition
Coenocytic fungi consist of a continuous cytoplasmic mass having hundreds or thousands of __, it results from repeated division of nuclei without __ |
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Term
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Definition
Some fungal species have specialized hyphae called __, which the fungi use to extract nutrients from – or exchange nutrients with – their hosts |
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|
Term
mycorrhizae Mycorrhizal fungi |
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Definition
Mutually beneficial relationships between fungi with haustoria and plant roots are called __ __ = fungi that form mycorrhizae |
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Term
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Definition
__ fungi form sheaths of hyphae over the surface of a root and also grow into the extracellular spaces of the root cortex |
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Term
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Definition
__ fungi extend their branching hyphae through the root cell wall and into tubes formed by invaginations (pushing inward) of the root cell membrane |
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Term
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Definition
Almost all __ have mycorrhizae and rely on their fungal partners for essential nutrients |
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Term
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Definition
Fungi are __ , they do not ingest (eat) their food, they absorb nutrients from the environment __ of its body |
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Term
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Definition
Fungi absorb nutrients by secreting hydrolytic enzymes called __ into their surroundings. These enzymes break down complex molecules to smaller organic compounds that the fungi absorb into their bodies and use |
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Term
Cytoplasm, Mitochondria Ribosomes even nuclei |
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Definition
Pores in septa allow flow of what? __ |
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Term
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Definition
__ fungi break down and absorb nutrients from nonliving organic material |
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Term
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Definition
__ fungi absorb nutrients from the cells of living hosts |
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Term
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Definition
Some parasitic fungi are pathogenic, they are responsible for __ of plant diseases |
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Term
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Definition
__ fungi absorb nutrients from a host organism, but they reciprocate with actions that benefit the host |
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Term
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Definition
Most common fungal body structures are multicellular __ and single cells (yeasts) |
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Term
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Definition
Nuclei of fungal hyphae and spores of most fungal species are __, although many fungi have transient __stages that form during sexual life cycles |
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Term
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Definition
Sexual reproduction begins when hyphae from two mycelia release sexual signaling molecules called __ |
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Term
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Definition
Fungi: Mushrooms & Mycelia: primarily __, with only brief diploid phases |
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Term
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Definition
__ – mycelium with different nuclei |
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Term
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Definition
Union of the cytoplasms of two parent mycelia is called __ |
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Term
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Definition
__ – mycelium with two nuclei |
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Term
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Definition
During __ the haploid nuclei contributed by the two parents, fuse, producing diploid cells. zygotes and other transient structures for during this stage or reproduction |
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Term
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Definition
Karyogamy is the only __ stage in most fungi |
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Term
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Definition
__ then restores the haploid condition, leading to the formation of spores that enable fungi to disperse |
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Term
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Definition
many fungi reproduce asexually by growing as filamentous fungi that produce __ by mitosis |
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Term
|
Definition
many fungi species that produce spores asexually can also reproduce __ if they happen to contact a member of their species of a different mating type |
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Term
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Definition
__: Calvatia gigantea Up to 1.5 m diameter, 20 kg. up to 5 trillion spores |
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Term
Generalized fungal reproduction |
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Definition
__: formation of heterokaryotic stage |
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Term
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Definition
__: in plasmogamy a form of crossing-over |
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Term
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Definition
Heterokaryotic stage = __ |
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Term
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Definition
Unfused nuclei from different __ |
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Term
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Definition
__ can occur from hours to days or even decades to centuries later.. |
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Term
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Definition
__ – haploid nuclei in heterokaryotic mycelium FUSE to form diploid mycelium |
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|
Term
summary morphology in fungi |
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Definition
Aerial spores, aerial fruiting bodies, mycelia in substrate |
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Term
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Definition
Kingdom Fungi and _ are more closely related to each other than either is to plants or most other eukaryotes |
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Term
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Definition
Fungi evolved from a __ancestor even though The majority of fungi lack __ |
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The fungi, the animals, and their protistan relatives form a clade and members of this clade are called __ |
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The ancestor of fungi was __ because fungi are more closely related to several groups of single-celled protists |
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Multicellularity in fungi & animals evolved __ |
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First known fossil fungi __ |
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Fungi was closely related to __ – group of single celled protists that consists of amoebas that feed on algae and bacteria |
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Animals and fungi diverged into separate lineages about __ |
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Fungal diversity may have originated when multicellular plants and animals __ |
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Earliest land plant fossils approx. 450 Mya have mycorrhizae. __ facilitated land invasion |
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__ of plants have mycorrhizae |
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chytrids, zygomycetes, glomeromycetes, ascomycetes, and basidiomycetes |
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Most mycologists recognize five phyla of fungi, __ |
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Fungi are well adapted as decomposers of organic material,they are primarily responsible for keeping ecosystems stocked with the __ essential for plant growth |
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plants, algae, cyanobacteria, and animals |
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Fungi may form mutualistic relationships with __ |
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All plant species studied to date appear to harbor symbiotic __ = fungi that live inside leaves or other plant parts without causing harm |
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digestive proteins and carbohydrates digest |
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Some fungi share their __ services with animals, helping break down plant material in the guts of cattle and other grazing animals As fungi grow, their hyphae develop specialized swollen tips that are rich in __ Fungi can also break down things into substances the insects can __ |
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__ = symbiotic association between a photosynthetic microorganism and a fungus in which millions of photosynthetic cells are held in a mass of fungal hyphae |
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Fungus gives a __ its overall shape and structure and Algae or cyanobacteria occupy an inner layer below the __ |
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In most lichens, each partner provides something the other __ obtain on its own |
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__ provide carbon compounds __ fix nitrogen and provide organic nitrogen __ provide their photosynthetic partners with a suitable environment for growth |
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Fungi of many lichens reproduce __ by forming ascocarps or basidiocarps |
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Lichen algae reproduce independently of the fungus by __ cell division |
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Asexual reproduction as a symbiotic unit also occurs commonly, either by fragmentation of the parental lichen or by the formation of __, small clusters of hyphae with embedded algae |
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__ – hyphae specialized to penetrate host tissue |
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__ = general term for fungal infection that parasitize animals |
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1000 species; the globular fruiting body forms multicellular, branched hyphae. But some are single-celled; thought to be one of the earliest fungal groups to diverge from other fungi; are ubiquitous in lakes and soil; have cell walls made of chitin; paraphyletic group |
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1000 species; hyphae grow rapidly into foods such as fruits and bread; |
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160 species; are of great ecological importance because many plants form mycorrhizal associations with these fungi; Formerly thought to be zygomycetes; monophyletic group; 90% of all plant species have mutualistic partnerships with this fungi |
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65,000 species; also called sac fungi; common to marine, freshwater, and terrestrial habitats; bear their sexual stages in fruiting bodies or ascocarps ; conidia are produced externally at the tips of specialized hyphae called conidiophores; |
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30,000 species; important as decomposers and ectomycorrhizal fungi; also called club fungi; have long-lived, Dikaryotic mycelium; mushrooms, puffballs, and shelf fungi ; includes mutualists that form mycorrhizae and two groups of destructive plant parasites: rusts and smuts; important decomposers of wood and other plant materials; best at decomposing the complex polymer lignin |
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LIFE ON LAND: __ ago: Land began to host thin coatings of Cyanobacteria |
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