Chitinases are examples of
a. systemins.
b. phytoalexins.
c. PR proteins.
d. R genes.
e. heat-shock proteins.
C
Biology & Microbiology
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Character changes in molecular sequences are generated by
a. insertions. b. deletions. c. substitutions. d. base pairing. e. insertions, deletions, and substitutions.
Biology & Microbiology
Although water is considered a renewable resource, what is a reason why it might be more like a nonrenewable resource?
a. water resources are not evenly distributed around the world b. water can be used up faster than it can be returned in the water cycle c. water can be polluted, depleting the supply of fresh water d. b and c e. all of the above
Biology & Microbiology
Do plants have defense mechanisms?
a. Yes b. No
Biology & Microbiology
Hyphae are associated with which of the following?
A) yeasts B) algae C) molds D) protozoa E) helminths
Biology & Microbiology