Scientist think that many species have one common ancestor. Which answer choice best tells why scientists think this way?

Group of answer choices

homologous structures

all of the answer choices

the fossil record

vestigial structures

homologous structures.

Explanation:

If you look at many different organisms, you will see similar structures. Like humans have a forearm, birds have a wing, whales have fins, leopards have legs. The bones evolvolved to fit the animal