The Herbicide Atrazine Is a Known Endocrine Disruptor to the Development

question 25

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.

-The role of the nontreated males in this experiment is to

• A) increase the sample size.
• B) act as controls.
• C) show that not all matings are successful.
• D) determine number of matings per frog.

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Definitions:

Consumer Goods

Items produced for personal use by households.

Production Possibilities Frontier

A curve depicting all maximum output possibilities for two goods, given a set of inputs consisting of resources and other factors.

Economic Growth

A rise in the output of goods and services in the economy, measured from one time period to another.

Consumer Goods

Items bought by the typical consumer for their own use, encompassing long-lasting items, perishable products, and various services.