A Population of Hummingbirds with a Variety of Beak Sizes

question 94

Multiple Choice

A population of hummingbirds with a variety of beak sizes finds a new food source in a plant that has a long trumpet flower with nectar at the bottom of the trumpet. Over time, these hummingbirds develop longer beaks. This is an example of

• A) directional selection.
• B) stabilizing selection.
• C) disruptive selection.
• D) sexual selection.
• E) genetic drift.

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