The fish in a certain population average 10 millimeters in length. Imagine that a population of predatory birds arrives in the area, but they cannot eat fish longer than 15 millimeters. After a decade, if the fish average 14 millimeters in length, what probably happened?
A) There was disruptive selection for fish length.
B) The presence of the predator caused mutations for larger fish to occur.
C) The longer fish survived and produced more offspring than shorter fish.
D) There was stabilizing selection for fish length.
E) The fish and the predator coevolved.
C
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a. southern Africa. b. Asia. c. Chile. d. the Yukon. e. Australia.
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In the Meselson-Stahl experiment, bacterial DNA was labeled completely with heavy nitrogen (N-15)
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