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denpristay [2]
3 years ago
9

The fossil record shows that the average size of black bears was large during cold glacial periods and got smaller during warmer

time periods. What is this an example of? directional selection disruptive selection ecosystem selection stabilizing selection
Biology
1 answer:
snow_tiger [21]3 years ago
3 0

Answer: directional

Explanation:

Because only one trait was favored. When bears are cold, being bigger helps them better adapt to the coldness. Adjusting to the weather is one trait.

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