The genetic equilibrium of a population can be upset

by all EXCEPT which of the following?
a. mutations
b. migration
c. random mating
d. genetic drift
e. natural selection


Answer: c

Biology & Microbiology

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Resolving power

(a) is the amount that an object’s image is enlarged. (b) is the extent to which detail in an image is preserved during the magnifying process. (c) is the degree to which image details stand out against their background. (d) focuses light rays emanating from an object to produce an image.

Biology & Microbiology

Based on this figure, which of the following is the largest risk factor for cancer?

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

Biology & Microbiology

Kettle ponds derive from a hole left by a retreating glacier that is subsequently filled with rainwater. A certain region has a series of disconnected kettle ponds, but occasionally heavy rains flood them and create streams. Which type of animal is most likely to be present in this area as a metapopulation?

A. A dragonfly B. A mosquito C. A fish D. An aquatic bird

Biology & Microbiology

Which of the following statements about the lateral line system is not correct?

A. Allows a blind cave fish to sense the water patterns flowing past its body B. Allows fish to sense objects based on the pressure waves they produce C. Allows fish to swim in synchrony with a school of other members of its species D. Allows fish to sense objects based on the low-frequency vibrations they produce E. Provides the fish with the ability to see images

Biology & Microbiology