Reading...
Play button
Play button
Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
17 Cards in this Set
- Front
- Back
|
infection
|
Invasion and multiplication of a pathogen in a host. Disease follows if defenses are not mobilized fast enough; the pathogen's activities interfere with normal body functions
|
|
|
Lysis
|
[Gk. lysis, a loosening] Gross damage to a plasma membrane, cell wall, or both that lets the cytoplasm leak out; causes cell death.
|
|
|
methanogen
|
Anaerobic archaebacterium that produces methane gas as by-product.
|
|
|
microorganism
|
Organism, usually single celled, too small to be observed without a microscope.
|
|
|
numerical taxonomy
|
Study of the degree of relatedness between an unidentified organism and a known group through comparisons of traits. Used to classify prokaryotic species.
|
|
|
pathogen
|
[Gk. pathos, suffering, + genes, origin] Any virus, bacterium, fungus, protistan, or parasitic worm that can infect an organism, multiply in it, and cause disease.
|
|
|
plankton
|
Gk. planktos, wandering] Of aquatic habitats, a community of suspended or weakly swimming organisms, mostly microscopic.
|
|
|
prion
|
Small infectious protein that causes rare, fatal degenerative diseases of the nervous system.
|
|
|
prokaryotic fission
|
Cell division mechanism by which a bacterial cell reproduces.
|
|
|
protistan
|
[Gk. protistos, primal] Photoautotroph or heterotroph (or both) unlike bacteria; some like earliest eukaryotic cells. Has a nucleus, larger ribosomes, mitochondria, ER, Golgi bodies, chromosomes with numerous proteins, and cytoskeletal microtubules. Range in size from microscopic algae to giant kelps.
|
|
|
protozoan
|
Type of protistan that may be like the single-celled heterotrophs that gave rise to animals. Amoeboid, animal-like, and ciliated protozoans are major categories.
|
|
|
red alga
|
Type of photoautotrophic protistan; most are multicelled and aquatic; an abundance of phycobilins masks their chlorophyll a.
|
|
|
slime mold
|
Phagocytic predators; resemble fungi in some respects
|
|
|
sporozoan
|
Type of parasitic protistan. Forms a motile infective stage inside specific host cells; some form cysts. One end of the body has a complex of structures used to penetrate hosts.
|
|
|
viroid
|
Infectious particle of short, tightly folded strands or circles of RNA.
|
|
|
virus
|
A noncellular infectious agent made of DNA or RNA, a protein coat and, in some, an outer lipid envelope; it can be replicated only after its genetic material enters a host cell and subverts the host's metabolic machinery.
|
|
|
water mold
|
Distant relatives of yellow-green and brown algae; resemble fungi in some respects
|
