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Biology
Undergraduate 2
09/28/2009

Additional Biology Flashcards

 


 

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Term
influenza
Definition
highly contatious resp infection, enters through mucus membranes of ear, nose, or mouth
Term
200,000;36,000
Definition
5%-20% of US population gets it; over (_) is hospitalzied with flu; and about (_) die
Term
one billion; 3-5 million, 500,000
Definition
worldwide cases of flu (-); (_) of severe illness; (-) die from flu
Term
pneumonia and from exacerbations of cardipulmonary conditions and other chronic diseases
Definition
causes of deaht with flu
Term
swine flu
Definition
 respiratory disease of pigs caused by type A influenza viruses that causes regular outbreaks in pigs. People do not normally get swine flu, but human infections can and do happen.
Term
bird flu
Definition
commonly used to refer to Avian flu (see below). Bird flu viruses infect birds, including chickens, other poultry and wild birds such as ducks
Term
avian flu
Definition
caused by influenza viruses that occur naturally among wild birds. Low pathogenic AI is common in birds and causes few problems. Highly pathogenic H5N1 is deadly to domestic fowl, can be transmitted from birds to humans, and is deadly to humans. There is virtually no human immunity and human vaccine availability is very limited.
Term
pandemic flu
Definition
virulent human flu that causes a global outbreak, or pandemic, of serious illness. Because there is little natural immunity, the disease can spread easily from person to person. Currently, there is no pandemic flu.
Term
influenza Hemagglutinin (HA)
Definition

found on surface of influenza 

Two primary functions:

   1. to identify target vertebrate cells by binding to host cells‘ receptors, and

   2. allowing the entry of the viral genome into the target cells by causing the fusion of host          membrane with the viral membrane.

Term
HA
Definition
protein against which the host directs antibodies that can neutralize the virus. *** there is no cross-protective immunity mediated by antibodies from one HA subtype to another.
Term
16
Definition
number of HA subtypes
Term
H1-3
Definition
HA subtypes found in human flu
Term
H5
Definition
attacks proteins in the digestive system of birds
Term
viral neuraminidase (N)
Definition
enzyme that helps the virus to be released from a host cell
Term
N inhibitors
Definition
limits the severity and spread of viral infections
Term
1, 2, 1
Definition

 

The current swine flu is actually a virus

   that consists of ? avian, ? swine, and ? human origins.   It is “NEW”!

Term
1.4 million
Definition
number of identified species
Term
microbes
Definition
too small to be seen clearly without a microscope
Term
0.2-1.0
Definition
prokaryotes range in size ? to ? micrometers
Term
10-100
Definition
unicellular eukaryotes range in size ? to ? micrometers
Term
1/1,000,000 of a meter
Definition
size of a micrometer
Term
viruses, viroids, and prions
Definition
smaller than bacteria
Term
viroids, viruses and prions
Definition
derived from organisms but are not organisms
Term
0.05-0.2 (small)
Definition
viruses are ? to ? micrometers and comes in many different shapes
Term
genome and capsid
Definition
all viruses have these two parts
Term
genome
Definition
genetic info; can be single or double stranded DNA or Rna
Term
capsid
Definition
protein coat which surrounds and protects genome
Term
envelope
Definition
some viruses hve this
Term
envelope
Definition
membrane (phospholipid bilayer) which surrounds the capsid
Term
hijack cells
Definition
genetic material of the virus reprograms the host cell to make more viruses; they are highly specific for the organism it infects
Term
viroids
Definition
simpler and smaller than viruses; fragments of single stranded RNA with no protein coat
Term
viroids
Definition
like virus, takes over the cell it infects
Term
viroids
Definition
hijack cells; plant pathogens that infect citrus, potatoes, advocadoes
Term
prions
Definition
unusual infectious particles
Term
prions
Definition
protein particle with no genetic material
Term
prions
Definition
protein thats folded wrong and make other proteins fold wrong
Term
bacteria and archaea domain
Definition
prokaryotes
Term
prokaryotes
Definition
1st organismsto appear on earth, 3.5 billion years ago
Term
prokaryote cell wall
Definition
semi rigid, permeable, composed of peptidoglycan (carb with amino acids attached) gives bacteria shape
Term
baccili, cocci, spiralli
Definition
shapes of prokaryotes
Term
capsule or slime layer
Definition
surround the cell wall of some bacteria
Term
capsule
Definition
highly organized, firmly attached to cell wall
Term
slime layer
Definition
less organized, loosely attached to cell wall
Term
pili
Definition
another way bacteria attach them to a surface; hairlike structures on surface of bacteria
Term
rotating flagella
Definition
about half of bacteria specis are capable of motion using..
Term
endospore
Definition
protective resting structures, bacteria surrounded by durable cell wall. resistant to extreme conditions
Term
binary fusion
Definition
most reproduction in bacteria is asexual int he form of..
Term
conjugation using plasmids
Definition
some bacteria is sexual if the form of..
Term
photosyn or chemosyn
Definition
energy source ofprokaryotes
Term
bacteria and archaea
Definition
similar with single celled,  prokaryores, small size
Term
bacteria and archaea
Definition
differ in their cell membrane lipids structure, cell wall compostition, rRNA subunit sequence
Term
protists
Definition
represents unsual mix of organisms
Term
protists
Definition
all eukorayotic, mostly single celled,
Term
fungus, plant, animal
Definition
protists can be organized into three groups..
Term
fungus like protists
Definition
unicellular decomposers
Term
water molds
Definition

 form a small division of fungus like protists which is characterized by filamentous bodies and mobile flagellated gametes

Term
slime molds
Definition

type of fungus like protists:  two-part life cycle in which the cells of many “individuals” form an interactive aggregate which is almost multicellular.

Both typeshave: a mobile feeding stage

 

and a stationary reproductive stage with a fruiting body which produces spores.

Term
plant like protists
Definition
(phytoplankton and algae).  Represent base of most aquatic food webs (lots of photosynthesis and O2 production)
Term
dinoflaggelates (plant like protists)
Definition

 

 Division Pyrrophyta\

Most are marine, 2 flagella

Term
diatoms
Definition

 Division Chrysophyta

Freshwater or marine, glasslike ‘shells’ with holes to allow for exchange of substances

Term
euglenoids (plant like protists)
Definition

Division Euglenophyta

-most freshwater

-1 to 3 flagella

-mostly photosynthetic

-lack cell wall

-have photoreceptor called ‘eyespot’

Term
simple plants (algae)
Definition

Some species of plant-like protists (the “seaweeds” have just been moved from Kingdon Plantae to Protista.

Term
red, brown, green
Definition
three divisions of simple plants (algae)
Term
red algae
Definition
division rhodophyta; mostly marine; used in cosmetics, ice cream
Term
brown algae
Definition
division phaeophyta; marine, giant kelp forests; gas bladders used
Term
green algae
Definition
division chlorophyta; marine and freshwater; ancestor to land plants; cell wall only cellulose
Term
spirogyra
Definition
have unique helical chloroplasts
Term
animal like protists
Definition

 

Protozoans are heterotrophic protists which actively seek and ingest their food (either food particles or other organisms)

The protozoans include three phyla:

Term
one of animal like protists (protozoan)
Definition
  Zooflagellates/Sarcodines   Phylum Zoomastigophora
Term
zooflagellates
Definition
one of animal like protists; – 1 flagellum, free living and symbiotic species (some parasitic)
Term
sarcodines
Definition
one of animal like protists; amoebae
Term
ergots
Definition
are fungal resting bodies which contain toxic alkaloids
Term
ergotism
Definition
 which can include crawling sensations in the skin, tingling in the fingers, vertigo, ringing in the ears, headaches, hallucination, painful muscular contractions leading to convulsions, vomiting, and diarrhea. All of these symptoms are mentioned in the records of the Salem witch trials.
Term
kingdom fungi
Definition

consists of organisms which are eukaryotic and mainly multicellular.  They are all heterotrophic decomposers that obtain their food by absorption.

Term
mycelium
Definition
feeding network of a fungus
Term
mycelium structure of a fungus
Definition

 

This network may be very large but is usually underground or under the surface of a decaying organism. 

The mycelium is composed of a woven mesh of hyphae

Term
hyphae
Definition
threadlike filaments of a fungus
Term
hyphae
Definition
building structure of the mycelium; consists of tubular cell wall containing chitin surrounding a plasm membrane and cytoplasm
Term
chitin
Definition

 a structural polysaccharide of modified sugars

Term
septa(singular septum)
Definition
 structures which partially separate the cytoplasm inside the hyphae and are found in many but not all fungi
Term
spores
Definition
haploid cell which cn grow directly into a hypha
Term
fungus
Definition
use absorption to obtain their food
Term
fungus
Definition
three variations depending on the food type
Term
saprobes
Definition
one variation: decomposers of dead material (most fungi)
Term
parasites
Definition
second varition; fungi which grow on living organisms
Term
mutualists
Definition
third variation; live interdependtly with photosynthetic organisms
Term
lichens
Definition

 formed of a symbiotic relationship between a fungal species and either a cyanobacteria or a unicellular photosynthetic eukaryote

Term
mycorrhizae
Definition
symbiotic relationships between fungi and the roots of a plant
fungi help send the plant water, minerals and nutrients
some of the sugars the plant produces are absorbed by the fungus
Term
lichens and mycorrhyizae
Definition
2 mutualists
Term
dna sequence data, presence of septa and on the sexual life cycle
Definition
four divisions of fungi are based on:
Term
zygote, sac, club, imperfect
Definition
four major divisions of fungi
Term
zygote fungi
Definition
named for the zygophore which has a thick cell wall; division zygomycota
Term
sac fungi
Definition

division ascomycota; named for hte sac which contains several haploid spores; 

both sexual and asexual reproduction are common    

septa present

include rye ergot (LSD), Dutch elm disease,

Term
club fungi
Definition
Division Basidiomycota
usually reproduce sexually, septa present
Term
imperfect fungi
Definition

 

 Division Deuteromycota

named for the apparent complete lack of sexual reproduction in the life cycle,

fungi whose sexual reproductin has not been observed

Term
VASCULAR AND NONVASCULAR
Definition
TWO TYPES OF LAND PLNTS
Term
NONVASCULAR PLANTS (BRYOPHYTES)
Definition

               no vascular tissue

no true roots, stems, or leaves

stomata and cuticle only in some

semi-aquatic because require water for reproduction

Term
liverworts (hepatophyta) and mosses (bryophyta)
Definition
two divisions of nonvascular plants
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