The forelimbs of bats and birds are ____.
A) homologous because their common ancestor had wings
B) not homologous because their similar internal bone structure evolved independently as an adaptation for flight
C) homologous because they are adapted for the same function
D) homologous because they have similar internal bone structure inherited from a common ancestor
E) not homologous because wings evolved from different ancestral organs in birds and bats

Question

Quizplus · Accepted Answer

The forelimbs of bats and birds are considered homologous structures because they share a similar internal bone structure that was inherited from a common ancestor, despite their adaptation for different functions (flight in both, but with different modifications). This similarity in structure is due to their common evolutionary origin, not because they evolved independently or from different ancestral organs.

The Forelimbs of Bats and Birds Are ____