Which of the following types of mutations are thought to be the LEAST common?
a. somatic mutations
b. germ-line mutations
c. neutral mutations
d. harmful mutations
e. beneficial mutations
Answer: e. beneficial mutations
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Vast ____________________ form in the interior of midlatitude continents. Fill in the blank(s) with the appropriate word(s)
How can radial symmetry be an advantage to slow-moving or sessile marine organisms? What will be an ideal response?
Based on the accompanying figure, which of the following age intervals has the highest death rate?
a. 0?1 b. 1?2 c. 2?3 d. 3?4 e. 4?5
Very rapid speciation occurred when cichlid fishes were isolated in Lake Victoria. Widespread extinction was dramatically seen when
A. hybridization stopped. B. predatory fish were added. C. fishing was prohibited. D. artificial selection stopped. E. insect larvae stocks were depleted.