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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?

A. directional selection
B. disruptive selection
C. ecosystem selection
D. stabilizing selection

Sagot :

GinnyAnsweridn

Final answer:

The fossil record showcasing changes in black bear size based on environmental conditions exemplifies Directional Selection in evolution.


Explanation:

Directional Selection is the concept demonstrated by the fossil record showing the average size of black bears changing based on environmental conditions. This type of selection favors phenotypes at one end of the spectrum, leading to changes in the population's genetic makeup to adapt to new conditions.

For example, during cold glacial periods, larger black bears were favored for survival, while in warmer periods, smaller bears had a better chance of survival. This process showcases how natural selection drives changes in a population based on environmental pressures.


Learn more about Natural Selection here:

https://brainly.com/question/4075522


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