Question

Medal 4 help
Evolution _____.

is always caused by mutation
is a slow, gradual change over time
happens very quickly

Answer 1

Evolution has nothing directly to do with the time scale over which it happens.

Sometimes evolution happens really quickly, as when a chemical that makes mutations happen gets into the organism. Sometimes it happens really slowly, as in genes that are absolutely essential to an organism's survival, where any mutations are almost certainly lethal.

Answer 2

so its A?

Answer 3

@hectoroftroy

Answer 4

Yeah, I think's A.

Answer 5

thnx:)