Which of the preserve shapes shown is the worst shape for a species that requires a core area?
A. A
B. B
C. C
D. D
E. All of the shapes have about the same measurements
Answer: B
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A small flock of birds becomes stranded on an isolated island during a hurricane
Their population expands across the island, and over a period of several decades, the average beak size in the population becomes smaller, helping the birds eat the smaller seeds and insects found on the island. Which one of the following processes is best illustrated in this example? A) Gene flow B) Extinction C) Natural selection D) Genetic drift
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