Question

Assume that male sticklebacks (a type of fish) that aggressively guard their nests are exposed to pollutants that mimic the female hormone, estrogen. this would _____.

Answer 1

Out of the following given choices;

               

A.      cause their nest-guarding activity to drop

B.      change male characteristics to female characteristics

C.      disrupt the estrogen receptors

D.      cause the males to become even more aggressive

 

The answer is A. The males would begin to search for the females for mating and hence reduce their guard of the nests. This would result in easy access of the nests to enemies and predators of  fish eggs and fingerlings.