The Herbicide Atrazine Is a Known Endocrine Disruptor to the Development

question 9

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.

-Supposed additional tests conducted on these two groups of frogs indicated that atrazine-treated frogs have lower fertility rates than nontreated frogs, even though both groups have adequate sperm content. What might be concluded about long term-effects of atrazine?

• A) Small body weight and decline in fertility in atrazine-exposed males will have a direct negative impact on populations of African clawed frogs.
• B) The inability to compete for females and the decline in fertility in atrazine-exposed males will have a direct negative impact on populations of African clawed frogs.
• C) Testosterone levels of atrazine-exposed males directly impact female frogs' copulation behaviors.
• D) Non-atrazine-treated frogs are more likely to show an increase in body weight and testosterone levels in the presence of sexually mature female frogs.

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Definitions:

Free-Land Era

A historical period characterized by the availability and acquisition of land at little to no cost, usually to promote settlement and development.

Zero Price

A situation where a product or service is offered to consumers at no cost, often as a part of a promotional strategy or business model.

Demand Curve

A graph showing the relationship between the price of a product and the quantity of the product that consumers are willing to purchase.

Loanable Funds

The total resources or funds available for borrowing in the financial markets, encompassing both savings and any additional credit provided by banks.