What Is Life? 2nd Edition by Jay Phelan

Exercise 2

What can be concluded about comparing differences in molecular biology between different species?
A) Extremely different species are fundamentally unrelated in any way.
B) Only DNA sequences can be used to compare relatedness between species.
C) Birds are more closely related to humans than dogs are.
D) Genetic similarities and differences demonstrate species relatedness.
E) The longer two species have been evolving on their own, the fewer the genetic differences between them.