BESC 204 exam 2 study set- lectures 7-10 Question and answers 100% correct
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BESC 204
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BESC 204
BESC 204 exam 2 study set- lectures 7-10 Question and answers 100% correct What are oomycota? - correct answer fungi that are more closely related to algae, in the kingdom stamenopila. they produce Oospores inside an Oogonium and the most well known one is Phytophthora
infestans. VERY SIMILAR T...
BESC 204 exam 2 study set- lectures 7-
10 Question and answers 100% correct
What are oomycota? - correct answer ✔fungi that are more closely related to
algae, in the kingdom stamenopila. they produce Oospores inside an
Oogonium and the most well known one is Phytophthora
infestans. VERY SIMILAR TO PLANTS
How are oomycota different than true fungi - correct answer ✔belong to
kingdom stamenopila (true fungi = mycota)
sexual spores = Oospores
derive from algae, cell walls are cellulose
diploid nuclei
no septa, zoospores with 2 flagella
how are Oomycota similar to true fungi - correct answer ✔cause important
diseases
same growth habit
same appearance
irish potato famine mold - correct answer ✔Phytophthora infestans
the inoculum was cull piles from the previous season, cold and wet was ideal
habitat
copper sulfate was a protection against it
impact of Irish potato famine (1845) on world events - correct answer ✔the
host for P.infestans had not gained resistance to european pathogens, and
had little genetic diversity
, it was a monoculture
movement of peoples to the united states- and any holidays/movies/names
that came from that
Monoculture - correct answer ✔farming strategy in which large fields are
planted with a single crop, year after year
affect of irish potato famine on the people - correct answer ✔population
dropped by 31% (1.5 mil left, 1 mil to disease/starvation) in 15 YEARS
weakened by hunger, other diseases killed before starvation
potato famine (1845) impact on understanding of microorganisms causing
disease - correct answer ✔Berkeley- convinced a 'mold' did it
DeBary- proved this by inoculating a potato with the fungus, therefore causing
it to get the blight
Koch- formalized this, got credit
why aren't DeBary, Berkeley, and Lindly given credit for germ theory? - correct
answer ✔everyone was coming to similar conclusions at the same time, and
germ theory technically didn't exist yet
examples of scientists at the time: pasteur, lister, koch
Koch's Postulates - correct answer ✔a sequence of experimental steps for
directly relating a specific microbe to a specific disease
use kochs postulates to understand a disease - correct answer ✔1.
Microorganism must be observed in every case of the disease
2.it must be isolated and grown in pure culture
3. the pure culture must reproduce the disease in animals
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