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?

Conservation biology is an applied science that focuses on protecting Earth's biodiversity and maintaining natural ecosystems. It involves analyzing and reducing the human impact on the environment.  Conservation biology applies an understanding of how organisms interact with their environment to manage and protect species and ecosystems. It aims to protect species, their habitats, and ecosystems from excessive rates of extinction and the erosion of biotic interactions.  Biodiversity is the number and kinds of species in a location or on the planet. It can be measured by taking into account... Show more

Conservation biology is an applied science that focuses on protecting Earth's biodiversity and maintaining natural ecosystems. It involves analyzing and reducing the human impact on the environment. 

Conservation biology applies an understanding of how organisms interact with their environment to manage and protect species and ecosystems. It aims to protect species, their habitats, and ecosystems from excessive rates of extinction and the erosion of biotic interactions. 
Biodiversity is the number and kinds of species in a location or on the planet. It can be measured by taking into account the number of species and their commonness. 
 

Related Test: Basic Biology Practice Test: Ecosystems and Restoration Ecology

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