BESC 204 Final Exam with Complete Solutions Graded A+
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Module
BESC 204
Institution
BESC 204
BESC 204 Final Exam with Complete Solutions Graded A+
This is the name used in class for the fungal structure characterized by a compact mass of hyphae with or without host tissue, usually with a darkened rind, and capable of surviving unfavorable environmental conditions: - Answer-sclerotium
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BESC 204 Final Exam with Complete
Solutions Graded A+
This is the name used in class for the fungal structure characterized by a compact mass
of hyphae with or without host tissue, usually with a darkened rind, and capable of
surviving unfavorable environmental conditions: - Answer-sclerotium
When a sporangium of Phytophthora infestants germinates:
a. the sporangium produces a germ tube that forms an appressorium and infects the
host
b. the sporangium produces zoospores that encyst and infect the host
c. either a or b depending on environmental conditions
d. P. infestants does not make sporangia - Answer-c. either a or b depending on
environmental conditions
What was the name of the toxin implicated in the pet food and wild bird seed poisonings
throughout the U.S. several times in the last 10 years? - Answer-aflatoxin
Th medicinal use of a secondary metabolite produced by Claviceps purpurea - Answer-
inducing labor
A fungus that can grow in yeast form and hyphal form is - Answer-dimorphic
Late Blight is a disease of both potato and tomato that was associated with the great
famine in Ireland in the 1800s. The causal organism in an Oomycete that is
necrotrophic. The organism spreads from host to host on a beetle that feeds on the
potato plant. - Answer-The statement is correct except either the name of the organism
is not Phytophthora infestans or it is not spread from host to host on a beetle.
An example of a cutaneous fungal disease of humans common in the population -
Answer-candidiasis
A fungal pathogen of humans that can invade healthy hosts and spread throughout the
body is from this class of pathogens: - Answer-systemic opportunistic
Which of the following disease causing organisms is not a "true fungus" - Answer-
Phytophthora infestans
, With what disease system is the concept of hypo virulence commonly associated? -
Answer-dutch elm disease
This father of plant pathology was instrumental in describing the cause of late blight of
potato - Answer-de Bary
According to your textbook, what plant disease is thought to have played a role in the
development of ginger bread? - Answer-stinking smut
Products of metabolism that are not essential for normal growth, development or
reproduction of an organism - Answer-secondary metabolite
The Puccinia pathway refers to - Answer-the long distance transport of urediospores of
the wheat rust fungus during the growing season
Which of the following statements about "Bordeaux Mixture" is NOT correct?
a. a principle component of the mixture is copper sulfate
b. copper based fungicides are still in use today
c. it was first used to combat a disease caused by Phytophthora infestans
d. the crop on which the disease was a problem was a grape - Answer-c. it was first
used to combat a disease caused by Phytophthora infestans
The most common mode of infection for the primary systemic mycoses we discussed in
class is - Answer-inhalation of propagules
Compare the zoopores of the Chytridiomycota to the Oomycota - Answer-One of them
produces two flagella
White nose syndrome is an emerging problem for hibernating bats in North America. the
responsible fungus is Moniliophthora. The fungus grows best at low temperature and
colonizes the soft tissue around the nose. This irritates the bat and rouses it from
hibernation. It then starves to death after spending energy without a food source to
replenish. - Answer-The statement above is correct except that the name we used in
class was not Moniliophthora
What is the primary ecological function of fungi? - Answer-degradation
The characteristic cell of fungi that grows via polarized growth is the - Answer-hypha
You encounter a species of fungi you do not immediately recognize. If you were to
attempt to sexually cross this fungus with another known fungus to determine its
species, you would be using this concept to identify it: - Answer-biological species
concept
Within its cell wall a true fungus has this characteristic molecule: - Answer-chitin
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