Question

Skeletal structures are common between two animals of different species. These structures probably exist because both species:
A.
Have a common food source.
B.
Live in the same environment.
C.
Have survived until the present time.
D.
Are related to a common ancestor.

Answer 1

The correct answer is:

D. Are related to a common ancestor.

Skeletal structures that are similar between different species often indicate that those species share a common ancestor from which they both evolved. This concept is a key aspect of evolutionary biology and helps scientists understand the relationships between different organisms.