An example of genetic variation used in pathogen survival may be
A. production of a comet's tail.
B. protease production.
C. inhibition of MHC Class I antigen production.
D. changing the pilus type.
E. production of a comet's tail AND protease production.
D
You might also like to view...
You discover a rare plant with white flowers that open at night and have a long, narrow floral tube. In developing a conservation plan for this species, what other organisms should you particularly focus on protecting in order to ensure this plant's continued reproductive success?
A. hummingbirds. B. bats. C. moths. D. butterflies. E. bees.
In peas, Mendel found that tall plants and yellow peas are dominant. The phenotype for a pea plant with the genotype
TTyy would be: a. intermediate height with greenish-yellow peas. b. short with green peas. c. short with yellow peas. d. tall with green peas. e. tall with yellow peas.
In response to the presence of endotoxin, phagocytes secrete tumor necrosis factor. This causes
A) the disease to subside. B) a decrease in blood pressure. C) a fever. D) a gram-negative infection. E) an increase in red blood cells.
Which of the following does not occur before a eukaryotic mRNA is exported from the nucleus?
(a) The ribosome binds to the mRNA. (b) The mRNA is polyadenylated at its 3? end. (c) 7-methylguanosine is added in a 5?-to-5? linkage to the mRNA. (d) RNA polymerase dissociates.