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 A demonstrated that
A) greater body weight is associated with high testosterone levels.
B) body weight does not correlate to a higher number of successful matings.
C) frogs gain weight over time.
D) frogs gain more weight in summer than winter.

Question

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 A demonstrated that
A) greater body weight is associated with high testosterone levels. 
B) body weight does not correlate to a higher number of successful matings. 
C) frogs gain weight over time. 
D) frogs gain more weight in summer than winter.

Quizplus · Accepted Answer

The paragraph does not mention anything about body weight or weight gain. Instead, it discusses the effects of atrazine on mating behaviors in frogs. The study compared an all-male population of sexually mature African clawed frogs exposed to atrazine to a population not exposed to atrazine to study the long-term effects of exposure on mating behaviors. The paragraph does not provide any information about testosterone levels or weight gain in frogs. Therefore, the correct answer is B, which states that body weight does not correlate to a higher number of successful matings.

The Herbicide Atrazine Is a Known Endocrine Disruptor to the Development