The Fish in a Certain Population Average 10 Millimeters in Length

question 102

Multiple Choice

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)The presence of the predator caused mutations for larger fish to occur.
• B)There was stabilizing selection for fish length.
• C)The longer fish survived and produced more offspring than shorter fish.
• D)There was disruptive selection for fish length.
• E)The fish and the predator coevolved.

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