Question

humans mice and giraffes share common ancestor what traits help scientists understand that these organisms share a common ancestor?
A. They all are very different in size
B. they all have seven vertebraes in their neck
C. they once had wings
D. they're all by pedal

Answer 1

B. they all have seven vertebrae in their neck (this is a unique and specific trait that indicates a shared ancestry)

Answer 2

A common ancestor is an organism that is the ____ ancestor of two or more different organisms.
A. direct
B. indirect
C favorite

Answer 3

A. direct

Answer 4

Natural selection is:
A. the idea that trades that help animals survive and reproduce become more frequent
B. embryo sharing features in the late stages of development
C.that all vertebrates have seven vertebrates in their neck

Answer 5

A. the idea that traits that help animals survive and reproduce become more frequent