Is the following statement true or false? "Vertebrates can never get ahead in the evolutionary race against their microbial pathogens."
a. True, vertebrate mutation rates are not high enough.
b. True, vertebrate population sizes are too small.
c. False, "real" evolution occurs only at the population level.
d. False, the population size of immune system cells in an individual host can be similar to that of microbial pathogens.
D
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Which of the following dietary fats is considered to be the least healthy?
A. Saturated fat B. Cholesterol C. Trans unsaturated fat D. All dietary fats are unhealthy
Most microorganisms live in eutrophic environments.
Answer the following statement true (T) or false (F)
Which is (are) true concerning the cell wall of prokaryotes?
A. It determines the shape of the bacteria. B. It prevents the bacteria from bursting. C. It contains peptidoglycan. D. It may be targeted by antimicrobials. E. All of the choices are true.
Nitrogen-fixing bacteria receive _______ from the plant in a mutually beneficial relationship.
Fill in the blank(s) with the appropriate word(s).