Bio Questions... Need help!?

Question

Q#1 Speciation can occur as a result of reproductive isolation. Reproductive isolation can occur when individuals in two populations of organisms

A use different types of behaviors to attract mates

B have anatomical features that make it difficult for organisms from the different populations to mate and transfer s*x cells

C mate with each other but produce offspring that are nonviable

D can't mate with each other because mating occurs at different times

E All of the choices are correct

Q #2 The situation in which a structure that evolved on one context is later adapted for another function

A. a conversion evolution

B. Parallel Evolution

C. A coincidental adaptation

D. An exaption

E. Coevolution

Answer 1

I am sure:

1. E

2. D

All of the answers in #1 can result in two species not being able to reproduce successfully.  Exaptation was formerly called Pre-adaptation, but biologists have changed the term because the old term was confusing.

Answer 2

E, A(not sure about the second one)

Answer 3

1.A

2. C

Not sure...