BESC 204 Exam 2 Question and answers 100% correct
oomycota - correct answer not "true fungi", characterized by production of thick-walled oospores and the production of mobile flagellate asexual spores (zoospores), more closely related to algae, cell walls contain cellulose, nuclei are diploi...
BESC 204 Exam 2 Question and answers
100% correct
oomycota - correct answer ✔not "true fungi", characterized by production of
thick-walled oospores and the production of mobile flagellate asexual spores
(zoospores), more closely related to algae, cell walls contain cellulose, nuclei
are diploid, no septa
oospore - correct answer ✔sexual spore of oomycete
zoospore - correct answer ✔mobile, flagellate asexual spore of oomycete,
have 2 flagella
oogonium - correct answer ✔"female" part of oomycete sexual reproduction;
contains oospores
antheridium - correct answer ✔"male" part of oomycete sexual reproduction
tinsel flagella - correct answer ✔type of flagellum with many hair-like
structures attached
whiplash flagella - correct answer ✔type of flagellum with no hair-like
structures
necrotrophic - correct answer ✔must kill its host in order to gain nutrients
biotrophic - correct answer ✔can only feed off host if the host is alive
, thigmotrophic - correct answer ✔directional growth of plant in response to
direct stimulation
Direct germination - correct answer ✔germination by hyphal growth
indirect germination - correct answer ✔germination by zoospore formation
Phytophthora infestans - correct answer ✔oomycete that caused late blight
of potato
late blight of potato - correct answer ✔caused by phytophthora infestans;
began in 1845, blight=crops collapsing, potatoes liquefy, 15 years, 31%
decline in population, "late" because it occurred late in the season
Anton DeBary - correct answer ✔father of plant pathology; proved late blight
was fungus-like by inoculating healthy potatoes; called the organism Botrytis
infestans
germ theory - correct answer ✔states that many diseases are caused by the
presence and actions of specific microrganisms within the body
Koch's postulate - correct answer ✔1) disease symptoms on host
2) isolate microbe from host and put it in pure culture
3) infect healthy host with microbe
*symptoms from 1 SHOULD match new symptoms*
4) isolate same microbe again from second host
Plasmopora viticola - correct answer ✔oomycete responsible for grape
downy mildew, introduced from the new world
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