In the Evolution of Whelk-Eating Behavior in Crows, Which of the Following

question 55

Multiple Choice

In the evolution of whelk-eating behavior in crows, which of the following did natural selection minimize?

• A)the average number of drops required to break the shell
• B)the average height a bird flew to drop a shell
• C)the average total energy used to break shells
• D)the average size of the shells dropped by the birds
• E)the average thickness of the shells dropped by the birds

---

Definitions:

Bondholder

An investor or owner of bond securities who has lent money to the issuing entity, such as a corporation or government.

Call Premium

The additional amount that must be paid by an issuer to redeem a bond before its specified call date.

Coupon Bond

A type of bond that offers interest payments through coupons attached to the bond, redeemable by the holder at certain times.

Zero-coupon Bond

A debt security that doesn't pay interest but is traded at a deep discount, offering profits at maturity.