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Biology SOL Vocabulary
All of the vocabulary words in the Virginia Biology SOL's
349
Biology
9th Grade
01/25/2010

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Term
qualitative observations
Definition
observations made with the five senses and written in adjectives
Term
quantitative observations
Definition
observations made with measurements and written in numbers
Term
hypothesis
Definition
a tentative explanation that accounts for a set of facts that can be tested by further investigation
Term
independent variable
Definition
the variable you change in an experiment
Term
dependent variable
Definition
the variable that may change as a result of a change in the independent variable and that you measure
Term
inference
Definition
an educated guess based on observations
Term
prediction
Definition
something that you think might occur in an experiment
Term
data
Definition
a collection of organized information, results
Term
constant
Definition
the variables you keep the same in an experiment
Term
control group
Definition
the group in the experiment where the independent variable is not changed
Term
procedure
Definition
a series of steps that you take to complete an experiment
Term
conclusion
Definition
an informed inference based on experimental data
Term
theory (simple definition)
Definition
a hypothesis that has been repeatedly supported and never proven wrong
Term
theory (SOL defintion)
Definition
an explanation of a large body of information, experimental and inferential, and serves as an overarching framework for numerous concepts. It is subject to change as new evidence becomes available.
Term
range
Definition
the difference between the highest and the lowest numbers
Term
mean
Definition
the average
Term
accuracy
Definition
measure of closeness to a known standard (i.e. how close you are to the "right" answer)
Term
experimental error
Definition
error in procedure or uncertainty in experimental data
Term
valid
Definition
data that accurately reflects the concept intended to be measured
Term
invalid
Definition
an example of data that does not accurately reflect the concept intended to be measured
Term
reliable
Definition
trustworthy, dependable, data with no experimental error
Term
unreliable
Definition
misleading, data with much experimental error
Term
optimum
Definition
the best or maximum that can be achieved
Term
phenomenon
Definition
any observable occurance
Term
Cell Theory
Definition
All living things are composed of cells, cells come from other cells by the process of cell reproduction
Term
Germ Theory
Definition
The theory that germs (microorganisms) cause disease, often by infection through the air
Term
Infection
Definition
Invasion of an organism by pathogenic microorganisms or viruses that causes disease
Term
Light microscope
Definition
Uses light to magnify images of small objects
Term
organism
Definition
any living thing
Term
organelle
Definition
membrane bound structures inside of eukaryotic cells
Term
organic molecules
Definition
A carbon containing molecule that comes from a living organism
Term
prokaryote
Definition
cell lacking a membrane-bound nucleus or organelles, unicellular bacteria
Term
eukaryote
Definition
cell or organism with a membrane-bound nucleus and organelles
Term
Pasteur, Louis
Definition
French chemist that disproved spontaneous generation contributing to cell theory, discovered fermentation is caused by microorganisms resulting the in the pasteurization process, pioneered germ theory, and developed the first vaccine for anthrax.
Term
Hooke, Robert
Definition
English scientist who observed and named the cells of cork in 1665
Term
Leeuwenhoek, Anto Von
Definition
Dutch scientist who observed microorganisms like bacteria and protists in the 1670's
Term
Koch, Robert
Definition
German bacteriologist who isolated the anthrax bacterium supporting germ theory
Term
microorganism
Definition
an organism that can only be seen through a microscope
Term
disease
Definition
an abnormal condition that impairs the function of the organism, disrupts homeostasis
Term
pathogen
Definition
any agent (especially a virus, bacterium, or other microorganism) that causes disease
Term
sanitation
Definition
an action that reduces the spread of pathogens
Term
aseptic
Definition
being free from germs and infection
Term
vaccine
Definition
a substance that will spark an immune response when the organism is exposed to a particular virus
Term
complementary base pairs
Definition
holds together the two strands of DNA, A paris with T, G pairs with C
Term
x-ray crytallography/diffraction photography
Definition
a technique used to determine the shape of a molecule using the diffraction of x-rays
Term
Watson, James and Crick, Francis
Definition
made the first 3-D model of the double helix of DNA in 1953
Term
Franklin, Rosalind
Definition
Took x-ray diffraction photographs of DNA helping Watson and Crick with their work
Term
doble helix model of DNA
Definition
the coiled structure of double stranded DNA
Term
Chargaff, Erwin
Definition
Austrian biochemist that determined DNA contains like numbers of adenine/thymine and guanine/cytosine in 1950, led to an understanding of complementary base pairing
Term
collaboration
Definition
Multiple scientists working together towards the same goal
Term
Oparin, Alexander
Definition
Soviet biochemist who proposed that early Earth was covered in a "primordial soup" in his book "The Origin of Life" published in 1924
Term
Sidney Fox
Definition
American scientist who created protocells
Term
Miller, Stanley and Urey, Harold
Definition
Americans who conducted an experiment to test Alexander Oparin's theory by sparking a simulated primordial soup with electricity to form simple biomolecules in1953
Term
evidence
Definition
information that tends to prove a fact
Term
Redi, Francesco
Definition
Italian physician that disproved spontaneous generation
Term
water
Definition
H20, polar molecule
Term
cohesive
Definition
a compound that is attracted to the same compound
Term
adhesive
Definition
a compound that is attracted to different compounds
Term
polar bond
Definition
a bond in which electrons are shared unequally and spend more time around one atom
Term
covalent bond
Definition
a bond in which elecrons are shared equally
Term
hydrogen bond
Definition
a weak bond with a hydrogen atom
Term
heat capacity
Definition
the heat energy required to raise the temperature of a substance
Term
evaporation
Definition
when liquid transforms into gas
Term
transpiration
Definition
the evaporation of water from plants
Term
perspiration
Definition
water released by sweat glands to lose heat energy
Term
ice
Definition
solid water
Term
pH
Definition
a measure of how acidic or basic a solution is
Term
base
Definition
pH from 7-14, concentration of hydroxide ions (OH-) in solution
Term
acid
Definition
pH from 0-7, high concentration of protons (H+) in solution
Term
neutral
Definition
pH = 7
Term
distilled water
Definition
water that has been evaporated and condensed again in order to purify it
Term
metabolism
Definition
all the chemical reactions that occur in an organism
Term
macromolecule
Definition
a very large molecule such as a polymer (i.e. carbohydrate, lipid, nucleic acid, or protein)
Term
enzyme
Definition
protein that can catalyze a chemical reaction
Term
carbon, hydrogen, nitrogen, oxygen, phosphorus, and sulfur
Definition
the main components/elements of all living cells
Term
monomer
Definition
small molecules that join together in repeating units to form a polymer
Term
polymer
Definition
large molecules composed of smaller repeating monomers
Term
carbohydrate
Definition
used to store and release energy
Term
lipid
Definition
used to store energy
Term
nucleic acid
Definition
used to store genetic information
Term
proteins
Definition
structural molecules or enzymes
Term
amino acid
Definition
monomer of proteins
Term
fatty acids and glycerol
Definition
monomer of lipids
Term
monosaccharides
Definition
monomer of carbohydrates, a.k.a. simple sugars
Term
nucleotides
Definition
monomer of nucleic acids, made of nitrogen base, sugar, and phosphate
Term
protein structure
Definition
the 3-D shape of a protein, a.k.a. tertiary structure
Term
catalyst
Definition
molecule (usually protein) that speeds up a chemical reaction without changing itself
Term
temperature
Definition
measure of amount of heat energy
Term
photosynthesis reaction
Definition
6CO2 + H2O + sunlight energy --> C6H12O6 + 6O2
Term
photosynthesis
Definition
process by which producers trap sunlight energy to make gluose
Term
respiration
Definition
process by which organisms burn sugar with oxygen to make ATP energy
Term
respiration reaction
Definition
C6H12O6 + 6O2 --> 6CO2 + H2O + ATP energy
Term
carbon dioxide
Definition
CO2, released by organisms by cellular respiration
Term
oxygen
Definition
O2, released by producers by photosynthesis
Term
sunlight energy
Definition
travels as photons (particles) of light, used by producers to make glucose
Term
chemical energy
Definition
energy stored in molecules such as lipids, glucose, and ATP.
Term
chlorophyll
Definition
a green pigment molecule found in the chloroplast that traps sunlight energy in photosynthesis
Term
glucose
Definition
sugar made by producers by photosynthesis
Term
ATP
Definition
adenosine triphosphate, provides energy for the cell, made during cellular respiration
Term
reactants
Definition
substances that change in a chemical reaction
Term
products
Definition
substances that result from a chemical reaction
Term
multicellular
Definition
organism made of many cells
Term
unicellular
Definition
organism made of one cell
Term
monera
Definition
another name for eubacteria, bacteria with cell walls
Term
eubacteria
Definition
bacteria with cell walls
Term
archaebacteria
Definition
an ancient form of bacteria often found in extreme environments
Term
protist
Definition
unicellular eukaryote such as a paramecium, euglena, and amoeba
Term
Protozoa
Definition
a phylum within the kingdom Protista
Term
paramecium
Definition
a shoe-shaped protist covered in cilia
Term
euglena
Definition
a protist with chloroplasts and a single flagellum
Term
amoeba
Definition
a protist that moves using pseudopod extensions
Term
cilia
Definition
microscopic hair-like extensions on the outside of cells that can move back and forth
Term
flagellum
Definition
a whip-like tail used for locomotion
Term
pseudopod
Definition
cellular extension that stretches the membrane of a cell in order to move
Term
fungi
Definition
eukaryotic decomposer
Term
plant
Definition
multicellular eukaryotic producer
Term
animal
Definition
multicellular eukaryotic consumer
Term
nuclear membrane
Definition
the double-layered membrane enclosing the nucleus in eukaryotes
Term
nucleus
Definition
contains DNA, site where RNA is made
Term
mitochondria
Definition
site of cellular respiration and ATP production
Term
chloroplast
Definition
chlorophyll containing organelle, site of photosynthesis in producers
Term
cell wall
Definition
ridid barrier around cells of bacteria, fungi, and plants
Term
vacuole
Definition
organelle that stores water and food
Term
DNA
Definition
nucleic acid that stores genetic information
Term
RNA
Definition
nucleic acid used by ribosomes to make proteins
Term
ribosome
Definition
site of protein synthesis
Term
endoplasmic reticulum
Definition
transports materials though the cell
Term
Golgi
Definition
site where cell products are packaged for export
Term
lysosome
Definition
contains digestive enzymes
Term
cell membrane
Definition
controls what enters and leaves the cell
Term
cell
Definition
basic unit of structure and function of all living things
Term
diffusion
Definition
when dissolved substances move from an area of higher concentration to an area of lower concentration
Term
osmosis
Definition
diffusion of water through a cell membrane
Term
active transport
Definition
the movement of molecules across a membrane which requires ATP
Term
homeostasis
Definition
organism's regulation of its internal environment despite changes outside the body or cell
Term
cell specialization
Definition
the process by which a cell determines its specific function in a multicellular organism
Term
development
Definition
the series of changes an organism undergoes as it ages and grows
Term
phospholipid bilayer
Definition
two-layered arrangement of lipid molecules found in the cell membrane
Term
fluid mosaic model
Definition
structural model of plasma membrane where molecules are free to move sideways within the lipid bilayer
Term
transport proteins
Definition
proteins in the membrane that regulate what goes in to and out of the cell
Term
cholesterol
Definition
a lipid found in the cell membrane giving it flexibility
Term
dissolve
Definition
when a molecule is broken down in a liquid until you can't see it and it becomes a part of the solution
Term
concentration
Definition
a measure of how much of a substance is mixed in with another substance
Term
semi-permeable
Definition
a material that allows some molecules through but not others
Term
exocytosis
Definition
process by which intracellular chemicals are released into secretory vesicles
Term
endocytosis
Definition
the uptake of extracellular materials into the cell in vesicles
Term
autotroph
Definition
organism that makes its own food
Term
heterotroph
Definition
organism that eats other organisms for energy
Term
producer
Definition
organism that makes its own food
Term
consumer
Definition
organism that eats other organisms for energy
Term
decomposer
Definition
organism that breaks down matter for energy
Term
motile
Definition
able to move
Term
sexual reproduction
Definition
production of new organisms by fusing two gametes together
Term
asexual reproduction
Definition
production of new organisms by replicating, no gametes involved
Term
aquatic
Definition
living in or on water
Term
terrestrial
Definition
living in or on land
Term
tissue
Definition
a group of cells working together
Term
organ
Definition
a group of tissues working together
Term
organ system
Definition
a group of organs working together
Term
digestive system
Definition
breaks down food so nutrients can be absorbed into the blood and/or cells (stomach and intestines)
Term
respiratory system
Definition
brings oxygen to blood and removes carbon dioxide (lungs)
Term
circulatory system
Definition
carries oxygen and nutrients to cells while removing waste (blood, heart)
Term
urinary system
Definition
filters blood to remove waste (kidneys)
Term
excretory system
Definition
any organ system that removes something. Kidneys remove liquid waste, intestines remove solid waste, lungs remove carbon dioxide and some water, skin removes heat and some water.
Term
immune system
Definition
defends against bacteria, viruses, and other parasites (white blood cells, lymph nodes)
Term
nervous system
Definition
controls and coordinates body functions (brain, nerves)
Term
nerve
Definition
group of neurons, connects the brain to muscles or glands
Term
endocrine system
Definition
all of the glands that make hormones
Term
hormone
Definition
a chemical messenger released by one cell that travels to another, usually through the bloodstream
Term
genetic predisposition
Definition
when an individual has a gene that makes him or her more likely to have a certain trait (especially a disorder)
Term
virus
Definition
non-living, microscopic, infects a host cells to replicate its DNA or RNA
Term
protein coat
Definition
the protective layer around viral DNA or RNA
Term
host cell
Definition
the cell that is "hijacked" by a virus so it can replicate its DNA or RNA
Term
mitosis
Definition
division of the nucleus in order to form two genetically identical daughter cells
Term
sex cell
Definition
haploid gamete, sperm or egg
Term
meiosis
Definition
two divisions of the nucleus in order to form four haploid gametes
Term
diploid
Definition
having two copies of each chromosome
Term
haploid
Definition
having one copy of each chromosome
Term
gamete
Definition
haploid cell made for the purposes of sexual reproduction
Term
sperm
Definition
male gamete
Term
egg
Definition
female gamete
Term
germ cell
Definition
cell that will develop into a gamete, sperm or egg
Term
cytokinesis
Definition
division of the cytoplasm and the cell
Term
prophase
Definition
phase of mitosis or meiosis where the spindle fibers form and chromosomes become visible
Term
metaphase
Definition
phase of mitosis or meiosis where the chromosomes line up in the middle of the cell and attach to spindle fibers
Term
anaphase
Definition
phase of mitosis or meiosis where spindle fibers pull chromosomes to opposite ends of the cell
Term
telophase
Definition
phase of mitosis or meiosis where the nuclear membrane begins to reform
Term
crossing over
Definition
when homologous chromosomes in prophase I of meiosis form a tetrad and swap parts of their chromosomes
Term
Gregor Mendel
Definition
Father of Genetics, discovered inheritance of genes and dominant alleles
Term
probability
Definition
the chance something will happen
Term
Mendel's laws of heredity
Definition
Law of Dominance = dominant and recessive alleles, Law of Segregation = gametes are haploid, Law of Independent Assortment = genes randomly assigned to gametes
Term
genotype
Definition
allele combination, example = AA, Aa, or aa
Term
phenotype
Definition
observable traits of an organism
Term
gene
Definition
a segment of DNA that codes for a particular protein
Term
homozygous
Definition
genotype with like alleles
Term
heterozygous
Definition
genotype with unlike alleles
Term
allele
Definition
a version of a gene
Term
trait
Definition
heritable characteristic
Term
dominant
Definition
when present, the allele that is expressed in the phenotype
Term
recessive
Definition
when present in a heterozygous organism, it is the trait that is not expressed
Term
incomplete dominance
Definition
when alleles blend to form a third phenotype
Term
codominance
Definition
when both alleles in a genotype are expressed at the same time
Term
sex-linked
Definition
an allele that is found on a sex chromosome (X or Y chromosome)
Term
pedigree
Definition
a chart that depicts the inheritance of a genetic trait in a family
Term
dihybrid cross
Definition
Punnett square depicting possible genotypes of two traits in offspring
Term
Punnett square
Definition
a method for showing the potential the results of genetic crosses
Term
monohybrid cross
Definition
Punnett square depicting possible genotypes of one trait in offspring
Term
genetic disorder
Definition
a condition that results from a defective gene or chromosome
Term
Down syndrome
Definition
condition exhibitting by individuals with three copies of chromosome 21
Term
karyotype
Definition
a picture of all the homologous chromosomes in a cell
Term
trisomy
Definition
having three copies of a chromosome (instead of two)
Term
protein synthesis
Definition
process of making new proteins in the ribosome
Term
genetic variation/diversity
Definition
the variety of alleles present in a population
Term
mutation
Definition
any change to DNA
Term
recombination mutation
Definition
Crossing over during Prophase I of meiosis where homologous chromosomes swap DNA
Term
deletion mutation
Definition
loss of a single base or segment of DNA; will render a gene useless
Term
addition/insertion mutation
Definition
gain of a single base of segment of DNA; will render a gene useless
Term
substitution mutation
Definition
a single base of DNA is incorrectly replicated as a different base; will change one amino acid
Term
beneficial mutation
Definition
a mutation to a gene that makes the protein more functional than before
Term
detrimental/deleterious mutation
Definition
a mutation to a gene that makes the protein less functional than before
Term
genetic code
Definition
the nucleotide sequence of codons and the amino acids they code for
Term
chromosome
Definition
a highly coiled strand of DNA
Term
adenine
Definition
nitrogenous base found in DNA and RNA, pairs with thymine or uracil
Term
thymine
Definition
nitrogenous base found in DNA, pairs with adenine
Term
guanine
Definition
nitrogenous base found in DNA and RNA, pairs with cytosine
Term
cytosine
Definition
nitrogenous base found in DNA and RNA, pairs with guanine
Term
uracil
Definition
nitrogenous base found in RNA, pairs with adenine
Term
transcription
Definition
process of copying a gene from DNA into mRNA
Term
mRNA
Definition
messenger RNA that copies a DNA gene and is read by the ribosome
Term
cytoplasm
Definition
jelly-like substance inside cells
Term
DNA replication
Definition
process of unwinding DNA and assembling a new complementary strand for each old strand
Term
template
Definition
the orginal strand of DNA which provides the sequence necessary to assemble new strands of DNA
Term
forensics
Definition
the use of DNA technology to identify criminals
Term
genetic engineering
Definition
the process of removing, modifying, or inserting gene in to a DNA molecule
Term
eugenics
Definition
a movement in the early 20th century aimed at improving the human race by controlled selective breeding
Term
pseudo-science
Definition
any activity that may appear scientific but does not adhere to the scientific method
Term
human genome project
Definition
an international effort to identify and sequence every base and gene of the human genome
Term
cloning
Definition
making a genetically identical copy of an organism or cell
Term
classification
Definition
grouping related species into categories
Term
binomial nomenclature
Definition
the formal method of naming species (Genus species)
Term
domain
Definition
The three major groups of organisms (Eukaryota, Archaea, Bacteria)
Term
kingdom
Definition
Taxonomic rank after domain (Animalia, Plantae, Fungi, Protista, Eubacteria, Archaea)
Term
phylum
Definition
Taxonomic rank after kingdom and before class (ex: Chordata)
Term
class
Definition
Taxonomic rank after phylum and before order (ex: Mammalia)
Term
order
Definition
Taxonomic rank after class before family (ex: Primates)
Term
family
Definition
Taxonomic rank after order before genus (ex: Hominidae)
Term
genus
Definition
Taxonomic rank after family before species (ex: Homo)
Term
species
Definition
The smallest taxonomic rank (ex: Homo sapiens). A group of organisms that can interbreed and produce fertile offspring.
Term
fertile
Definition
capable of reproducing
Term
dichotomous key
Definition
forks into two branches, such as in an identification guide
Term
homologous structure
Definition
derived from the same ancestral structure
Term
flora
Definition
plant life
Term
fauna
Definition
animal life
Term
analogous structure
Definition
similar in appearance or function, but derived from different ancestral structures
Term
vestigial structure
Definition
structure that an ancestory used but is no longer functional in a current species
Term
fossil
Definition
any evidence of an organism that lived long ago (remnant, trace, or impression)
Term
extinction
Definition
when all the members of a species die out
Term
extinct
Definition
a species that no longer exists
Term
biochemistry
Definition
comparing DNA, RNA, and amino acid sequences in closely related organisms
Term
embryology
Definition
the study of the early stages of development in an organism, especially the comparison of closely related species.
Term
zygote
Definition
the first diploid cell resulting from the fusion of two gametes
Term
embryo
Definition
an organism in the early stages of development
Term
cladogram
Definition
A tree-like diagram that depicts relationships between species
Term
phylogenetic tree
Definition
A tree-like diagram that depicts relationships between species
Term
speciation
Definition
the creation of new species by splitting a population in two, each with its own adaptations to environmental pressures
Term
evolution
Definition
change of allele frequency in a population over time
Term
fossil record
Definition
the history of life as preserved in fossils
Term
radiometric dating
Definition
a method for dating rocks by measuring radioactive decay
Term
radioactive decay
Definition
the alteration of atoms as sub-atomic particles are released slowly over time
Term
genetic variation
Definition
differences in inherited traits among members of a population
Term
natural selection
Definition
theory of how evolution occurs, organisms with advantageous genetic traits survive and reproduce more than less fit individuals
Term
adaptation
Definition
a genetic trait the confers fitness to an organism in its environment
Term
over-production
Definition
when organisms produce more offspring than the environment can support
Term
competition
Definition
when two organisms of the same or different species want the same resources (food, territory, shelter, mates, etc.)
Term
selection
Definition
when organisms with more advantageous traits survive and reproduce while others do not
Term
offspring
Definition
products of reproduction, i.e. children
Term
generation
Definition
all organisms of a species born within a period of time
Term
Jean Baptiste Lamarck
Definition
French naturalist who proposed that evolution resulted from the inheritance of acquired characteristics
Term
Inherited characteristics
Definition
characteristics passed down from parent to offspring in genes
Term
Acquired characteristics
Definition
characteristics an organism obtains throughout its own lifetime
Term
Darwin, Charles
Definition
Revolutionary scientist who proposed evolution by natural selection in his book "On the Origin of Species" published in 1859
Term
Galapagos Islands
Definition
An archipelago off the coast of Ecuador where Charles Darwin made many observations
Term
environmental pressure
Definition
a condition or event that can hurt a population of organisms
Term
gene pool
Definition
the collection of all the alleles available in a population
Term
morphology
Definition
the form and structure of an organism
Term
Gould, Stephen Jay
Definition
Evolutionary biologist who proposed punctuated equilibrium in 1972
Term
punctuated equilibrium
Definition
Theory that species spend long periods of time without evolving between spurts of quick change
Term
relative dating
Definition
estimating the age of a rock by comparing with the age of nearby rocks
Term
absolute dating
Definition
determining the exact age of a rock by means of radioactive dating
Term
carrying capacity
Definition
the number of organisms that can be supported by the resources in an ecosystem
Term
limiting factor
Definition
the components of the environment that restrict the growth of populations
Term
growth curve
Definition
a graph that shows the growth and decline in population over time
Term
community
Definition
collection of interacting populations
Term
population
Definition
a group of organisms of the same species living in a certain area that can interbreed
Term
initial growth stage
Definition
when a population that is new to an area grows in numbers
Term
steady state
Definition
when a population size remains about the same over a long period of time
Term
decline
Definition
when a population size decreases in number
Term
exponential growth
Definition
when a population increases more and more every year (humans)
Term
biotic factors
Definition
all the living organisms that inhabit the environment, including predators, food sources, and competitors
Term
abiotic factors
Definition
the nonliving elements in an ecosystem, such as temperature, moisture, air, salinity, and pH
Term
ecosystem
Definition
consists of all the interacting species and the abiotic environment in a given geographic area
Term
predator
Definition
eats prey
Term
prey
Definition
eaten by predator
Term
symbiosis
Definition
a close and permanent relationship between organisms of two different species
Term
mutualism
Definition
a relationship between two species in which both benefit
Term
commensalism
Definition
relationship between two species in which one benefits and the other is not affected
Term
parasitism
Definition
relationship between two species in which one benefits and the other is harmed (but not killed)
Term
host
Definition
an organism that harbors a parasite, virus, mutual partner, or commensal partner
Term
nutrient cycle
Definition
circulation of carbon, oxygen, nitrogen, and phosphorus through the environment
Term
trophic level
Definition
position in the food chain
Term
food chain
Definition
simple transfer of energy from producer to herbivore to carnivore
Term
food web
Definition
complex interlocking pattern of food chains
Term
pyramid of energy
Definition
depicts how stored energy decreases in higher trophic levels
Term
pyramid of biomass
Definition
depicts howcombined mass of organisms decreases in higher trophic levels
Term
pyramid of numbers
Definition
depicts how population size decreases in higher trophic levels
Term
Succession (ecological)
Definition
a series of changes in a community in which new populations of organisms gradually replace existing ones especially after a disaster
Term
climax community
Definition
occurs when succession slows down and a stable community is established; made up of the fittest species
Term
deciduous forest
Definition
a forest of trees that lose their leaves in winter; the climax community of Virginia
Term
field guide
Definition
an illustrated book to help you identify different species you find outside
Term
interdependence
Definition
when two or more organisms need to the other(s) to survive or reproduce
Term
cnidarians
Definition
simple invertebrate animals with radial symmetry and stinging nematocyst cells; ex: jellyfish, coral
Term
invertebrate
Definition
groups of animals with no backbone
Term
vertebrate
Definition
group of animals with a backbone
Term
chordate
Definition
group of animals with a dorsal nerve cord and (usually) a backbone
Term
bird
Definition
group of vertebrate animals descended from reptiles with feathers, wings, beaks, and endothermy (warm-blooded)
Term
mammal
Definition
group of vertebrate animals known for hair, mammary glands, and endothermy (warm-blooded)
Term
reptile
Definition
group of vertebrate animals known for claws, teeth, scaly skin, and ectothermy (cold-blooded)
Term
amphibian
Definition
group of vertebrate animals that reproduces in water, but can live on land
Term
appendages (jointed)
Definition
any body part that extends from the main body, usually arms and legs. These are jointed in arthropods.
Term
arthropoda
Definition
largest animal phylum characterized by jointed appendages, hard exoskeleton, molting (ecdysis), and segmented body
Term
insecta
Definition
subphylum of arthropoda; ex: bugs, flies
Term
crustacea
Definition
subphylum of arthropoda, mostly aquatic ; ex: crab, lobster, shrimp, pill bug, barnacle
Term
mollusca
Definition
invertebrate animal phylum characterized by a muscular foot, mantle, and radula; ex: snail, slug, bivalves, squid
Term
echinodermata
Definition
invertebrate animal phylum characterized by being bilaterally symetrical as larvae and pentaradially symetrical as adults; ex: starfish, sea cucumbers, sand dollars, sea urchins
Term
annelida
Definition
invertebrate animal phylum of segmented worms; ex: earthworm, leech
Term
sponge
Definition
see porifera
Term
porifera
Definition
most ancient animal phylum that has no true tissues, ex: sponges
Term
filter-feed
Definition
a method of obtaining nutrients by passing water mixed with microscopic pieces of food through tentacles, gills, etc.
Term
platyhelminthes
Definition
invertebrate animal phylum of flatworms, ex: planaria, tapeworm
Term
planaria
Definition
an example of a platyhelminthe flatworm very often used in high school scientific experiments
Term
nematoda
Definition
invertebrate animal phylum of round worms, ex: C. elegans
Term
mosses
Definition
see bryophyta
Term
bryophyta
Definition
land plants with no seeds, flowers or vascular system; reproduce with spores; ex: moss
Term
ferns
Definition
see pteridophyta
Term
pteridophyta
Definition
plants with vascular systems (xylem and phloem), but no seeds or flowers, reproduce with spores; ex: fern
Term
confiers
Definition
see gymnosperm
Term
gymnosperm
Definition
land plants that produce seeds contained in a cone; ex: pine tree
Term
flowering plant
Definition
see angiosperm
Term
angiosperm
Definition
land plants that produce flowers, seeds, and fruit
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