The Following Diagram Shows the Bone Structure of a Whale

Multiple Choice

The following diagram shows the bone structure of a whale flipper and a bat wing. Which of the following suggests that these two structures are homologous rather than analogous?

A) Both the flipper and the wing contain five fingerlike bone projections.
B) The flipper is formed from the entire front appendage of the whale, but the wing is only formed from the hand part of the front appendage of the bat.
C) The bones that form the five fingerlike projections in the flipper have much thicker bones than the bones that form these projections in the bat.
D) The flipper of the whale contains more bones than the wing of the bat.