After reading the paragraph below, answer the questions that follow.
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
◦ atrazine-treated males were more successful in copulation with females than nontreated males.
◦ there were fewer atrazine-treated males than nontreated males.
◦ atrazine-treated males are unable to mate.
◦ nontreated males were more successful in copulation with females than atrazine-treated males.
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