Question

Consider a flower population that produces different sizes of blooms and depends on bees for reproduction. Large blooms attract larger bees; small blooms attract smaller bees. Describe how changes in the bee population might lead to disruptive, stabilizing, and directional selection in the flowers.

Answer 1

The parallel evolution of flowering plants and pollinators represents a case of coevolution. It may lead to different types of natural selection.

Disruptive, stabilizing, and directional selection

Disruptive selection is a type of natural selection that favors extreme phenotypes (in this case, flowers too small or too big).

Stabilizing selection is a type of selection that leads to decreased genetic variation  (in this case, all red flowers to attract pollinators)

Finally, directional selection is a type of natural selection where an extreme phenotype can be favored (in this case, taller plants to be noted by bees).

Learn more about natural selection here:

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