Question

Two species are able to breed with each other and produce offspring, but the offspring quickly die. This is a __________________ isolating mechanism. Select one:
a. Prezygotic
b. Biochemical
c. Sympatric
d. Postzygotic
e. Monophyletic

Answer 1

Answer: d. Postzygotic

Explanation:

The reproductive isolation is a mechanisms which includes geographical, physical and behavioral barriers which prevent members of two distinct species to mate and produce offsprings.

The postzygotic mechanism is an reproductive isolation mechanism in which the offspring/hybrid produce after the copulation of members of the two distinct species can be inviable or sterile.