The Use of DDT as an Insecticide in the United

question 4

Multiple Choice

The use of DDT as an insecticide in the United States has been outlawed since 1971, yet is still a problem for certain top-level carnivores in the United States. Which of the following choices best explains this apparent incongruity?

• A) DDT is still used for mosquito control in tropical countries, and certain migratory predators can be affected by a seasonal biomagnification.
• B) DDT is persistent in the environment and all of the pre-1971 DDT is still available in toxic form to poison top-level carnivores.
• C) Pre-1971 DDT has been deposited in certain habitats, particularly wetlands and estuaries, so predators in these ecosystems are vulnerable to biomagnifications of DDT.
• D) Whereas most DDT-susceptible species have become resistant to persistent DDT, others are still vulnerable.
• E) All of the options are correct.

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Definitions:

Innovative

Characterized by the introduction of new ideas, methods, or products; being creative and forward-thinking.

Social Inventions

Innovations or creations within society that relate to its organization, structures, or functioning, often addressing societal needs.

Social Inventions

Novel creations that represent solutions to social problems or additions to social practices, often in the form of norms, laws, or social structures.

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The combined endeavors of individuals working collectively towards a common goal, leveraging teamwork and collaboration.