Question

“Two individuals regularly unite for reproduction, which is all that concerns us. But still there are many hermaphrodite animals which certainly do not habitually pair.”
A) habitually pair
B) two individuals
C) for reproduction
D) do not habitually pair

Answer 1

The answer is do not habitually pair because regularly means that they do it often and pair means they meet together. Pair means the same thing as unite and habitually means the same thing as regularly, but the do not at the beginning specifies that they don't regularly unite, which is the opposite.

Answer 2

D) do not habitually pair