besc 204 exam 2 Questions with complete solution Mycology - correct answer the study of fungi
Fungus - correct answer a eukaryotic, heterotrophic organism, devoid of chlorophyll, with chitin in cell walls, that obtains its nutrients by absorption, usually reproduces by spores and usually ex...
besc 204 exam 2 Questions with
complete solution
what is an oomycete? - correct answer ✔not true fungi, more closely related
to algae
characterized by the production of thick walled oospores as sexual spores and
the production of mobile, flagellate asexual zoospores
produced inside an oogonium
what caused the irish potato famine? - correct answer ✔oomycete called
phytophthora infestans
how do oomycetes differ from true fungi? - correct answer ✔cell walls have
cellulose, not chitin
diploid nuclei, not haploid
no septa
zoospores have 2 flagella
biochemical pathway for lysine synthesis is achieved like plants, not fungi
ultrastructure of mitochondria is like plants, not fungi
what was the impact of the irish potato famine on world events? - correct
answer ✔high population of irish descent in america from immigration
st. patrick's day
notre dame fighting irish
"gangs of new york" movie
maybe possibly helped allies win ww1 as 700k germans died because copper
was being used to make bullets and couldn't be used to treat crops
, what role did the potato famine have on the development of our understanding
of microorganisms causing disease, especially "fungi?" - correct answer
✔this was before germ theory
led to the debate on whether fungi could cause disease
anton debary settled the argument in 1861 by showing that inoculating
potatoes with a particular fungus could cause late blight
what invention came about as a result of downy mildew of grapes? - correct
answer ✔bordeaux mixture: spray containing copper sulfate and lime
originally used to keep pilferers away, but also kept grapes healthy from
downy mildew
still used today
what are the names, structures, and reproduction methods of the organisms
that causes the potato famine and downy mildew of grapes? - correct answer
✔potato famine: phytophthora infestans, asexual reproduction with a
sporangium producing 2-flagellate zoospores, sexual reproduction with an
oogonium producing oospores
grape downy mildew: plasmopora viticola, asexual reproduction with a
sporangium, sexual reproduction with an oogonium producing oospores
both oomycetes
what is koch's postulate? - correct answer ✔the evidence required to
establish a relationship between microorganism and disease
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, when inoculated in animals, must reproduce the disease
4. microorganism must be recovered from the diseased animal
what is the life cycle of the wheat rust fungus? - correct answer ✔5 stages
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