BESC 204 - Exam 2 Questions with complete solution
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Module
BESC 204
Institution
BESC 204
BESC 204 - Exam 2 Questions with complete solution
What are oomycota? How do they compare to 'True Fungi?' - correct answer -water molds
found in moist or watery environments
-offshoot of Protista > more closely related to plants
-Have the same growth habit and appearance as true fungi
...
BESC 204 - Exam 2 Questions with
complete solution
What are oomycota? How do they compare to 'True Fungi?' - correct answer
✔-water molds
found in moist or watery environments
-offshoot of Protista > more closely related to plants
-Have the same growth habit and appearance as true fungi
-Create zoospores (asexual) and oospores (sexual)
Differences between Oomycetes and True Fungi - correct answer ✔-Derive
from algae
-Cell walls have cellulose
-Nuclei are diploid
-No septa are formed
-Zoospores make two flagella
-Lysine synthesis is achieved like plants
-Mitochondria is more like a plant's
How did the potato famine affect world events? - correct answer ✔-Most
profound illustration of direct impact of fungi on human affairs
-Destroyed the crop that sustained most of Ireland
-Caused millions to emigrate > faced discrimination
-Led to debates in early mycology
, What role did the potato famine have on our understanding of
microorganisms? - correct answer ✔-Caused debate about whether fungi
could cause disease in scientific literature
-DeBary discovered that potatoes inoculated with fungi could cause late blight
> figured out that fungi caused disease
Koch's Postulates - correct answer ✔a sequence of experimental steps for
directly relating a specific microbe to a specific 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 invention was made possible by the downy mildew of grape? - correct
answer ✔Bordeaux mixture > copper sulfate and lime spray
Cause of late blight of the potato - correct answer ✔-Phytophthora infestans
-Destroyed leaves and tubers
-Sporangia form on cull piles and blow to other plants
-Cool and wet temperatures perfect > enzymes kill plant tissue
Cause of downy mildew of grape - correct answer ✔-Plasmopora viticola
'Fungi' causing diseases - correct answer ✔Not true fungi that are actually
causing disease > caused instead by oomycetes that are more closely related
to algae
Life cycle of wheat rust fungus - correct answer ✔
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