Answer: genetics and mutation generate some of the variety that natural selection acts on
Explanation:
D
Punctuated equilibrium is a series of small, gradual changes over long periods of time.
50% chance of blood type A
50% chance blood type B
The correct answer is B, I know this because none of the other answers are even reasonable. For example-
A is wrong because the size of elephant tusk has not changed over time, elephant tusk just grow...
C is wrong because it makes no sense to hunt elephants with no tusk :/
D is completely wrong because tusk have nothing to do with reproduction, those are two completely separate bodily functions.........
