Question

Darwin theorized that over millions of years, a species can adapt so much that it ________ its ancestor.
A
reverts to

B
splits off from

C
mimics

D
kills

Answer 1

The most appropriate option to fill in the blank is:

B - splits off from

The complete sentence would read: "Darwin theorized that over millions of years, a species can adapt so much that it splits off from its ancestor." This aligns with the theory of evolution, which discusses how species can diverge from a common ancestor over long periods of time.