The Herbicide Atrazine Is a Known Endocrine Disruptor to the Development

Multiple Choice

The herbicide atrazine is a known endocrine disruptor to the development stages of several animal species, including fish, reptiles, and amphibians. Scientists interested in studying long-term effects of exposure to atrazine on mating behaviors compared an all-male population of sexually mature African clawed frogs (Xenopus laevis) exposed to atrazine (Atz) to a sexually mature population of African clawed frogs not exposed to atrazine (Con) . Amplexus is defined as the mating position of frogs.

-Part B indicates that

A) nontreated males were more successful in copulation with females than atrazine-treated males.
B) atrazine-treated males were more successful in copulation with females than nontreated males.
C) there were fewer atrazine-treated males than nontreated males.
D) atrazine-treated males are unable to mate.