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Changing Phenotypes in Anoles

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APBIO-YVNJHF

A study on the rate of evolutionary change in the anole lizard populations of a group of islands over a 12 year period determined that the average coloration pattern in a certain population changed from predominantly brown with green flecks to predominantly green with brown flecks.

This occurred during a prolonged pattern of above average annual rainfall between 1971 and 1983. During that time, there was an increase in the number broad-leaved, green plants.

Which of the following statements BEST explains the change in coloration pattern in the anole lizard population during the period of increased annual rainfall?

A

Anoles with more green and less brown were able to camouflage more effectively to evade predation and produced more offspring.

B

Anoles with more green and less brown were able to attack and kill the less well-camouflaged anoles with more brown and less green.

C

Anoles with more green and less brown were able to warm themselves more effectively in the sun, thereby allowing them to move faster and find more food.

D

Anoles that spent more time on the broad-leaved, green plants developed more green in their scales over time.