The bone structures of a human, a dog, a bird, and a whale are shown. Select the best response describing this image.

Question

a
The homologous structures are similar in structure, but different in function, indicating a common ancestor.
b
The analogous structures are similar in structure, but different in function, indicating a common ancestor.
c
The homologous structures are different in structure, but similar in function, indicating different ancestors
d
The analogous structures are different in structure, but similar in function, indicating different ancestors.

Answer 1

a
The homologous structures are similar in structure, but different in function, indicating a common ancestor.