One Explanation for the Evolution of Insect Wings Suggests That

question 71

Multiple Choice

One explanation for the evolution of insect wings suggests that wings began as lateral extensions of the body that were used as heat dissipaters for thermoregulation. When they had become sufficiently large, these extensions became useful for gliding through the air, and selection later refined them as flight-producing wings. If this hypothesis is correct, modern insect wings could best be described as

• A) adaptations.
• B) mutations.
• C) exaptations.
• D) isolating mechanisms.
• E) examples of natural selection's predictive ability.

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