Selfishness should be seen more often between unrelated individuals unless 1) there are repeated opportunities to be a donor or recipient, 2) the cost to be a donor is relatively low, and 3):
a) kin selection is a factor.
b) altruistic donors are not recognizable.
c) cheaters are recognizable and punished for cheating.
d) the benefits to the recipient are lower than the costs of the donor.
e) two individuals are secretly related, but they don't know it.
Answer: c) cheaters are recognizable and punished for cheating.
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What will be an ideal response?
Bacteria are most essential in the cycling of:
a. carbon. b. water. c. phosphorus. d. nitrogen. e. energy.
Prions cause disease by __________.
A. altering normal proteins B. causing transcription and translation of abnormal proteins C. altering genes D. the activity of a reverse transcriptase
Which of the following is the most correct description of the function of reverse transcriptase?
A) It synthesizes a DNA strand from an RNA template, degrades the RNA strand, and replaces the RNA with a new DNA strand. B) It synthesizes an RNA strand from an integrated DNA, then synthesizes the complementary strand to produce a double-stranded RNA. C) It synthesizes a DNA from an integrated DNA template, then synthesizes multiple RNA copies of the newly synthesized DNA molecule. D) It synthesizes an RNA strand from an infecting single-strand RNA then synthesizes multiple RNA copies of both strands. E) It synthesizes a DNA strand from an infecting RNA strand, then uses the DNA as a template for synthesis of multiple new RNA strands.