Question

question 7 of 10
what is a homologous structure?
a. a structure with similar shape but a different use
b. a structure that has no use in the organism
c. a structure that only exists in the embryo
d. a structure that is only in index fossils

Explanation:

Homologous structures are anatomical features in different organisms that have a similar underlying structure (derived from a common - ancestor) but may have different functions. For example, the fore - limbs of humans, bats, and whales have similar bone arrangements but are used for different purposes like grasping, flying, and swimming respectively.

Answer:

A. A structure with similar shape but a different use