Antigens that depend on the function of T-helper cells are called ________ antigens.
Fill in the blank(s) with the appropriate word(s).
T-dependent
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The env gene of the HIV genome encodes:
A. reverse transcriptase. B. integrase. C. capsid. D. matrix. E. surface glycoprotein.
Heat shock proteins are
A) only actively synthesized during conditions of intense heat. B) only observed in prokaryotic cells. C) molecular chaperones synthesized during times of cellular stress. D) unique to every organism. E) present only in certain organelles.
Mitosis is involved in
a. asexual reproduction and growth. b. asexual reproduction and genetic diversity. c. sexual reproduction and growth. d. sexual reproduction and genetic diversity.
Which of the following statements about speciation is correct?
A) The goal of natural selection is speciation. B) When reunited, two allopatric populations will not interbreed. C) Natural selection chooses the reproductive barriers for populations. D) Prezygotic reproductive barriers usually evolve before postzygotic barriers. E) Speciation is included within the concept of macroevolution.