The dewclaws of dogs are examples of

a. homologous structures.
b. analogous structures.
c. vestigial structures


C

Environmental & Atmospheric Sciences

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Humans often manipulate the environment in ways that decrease the overall ecosystem capital because

A) short-term gains are often local, while long-term losses in regulating and cultural services are experienced regionally. B) short-term gains are often regional, while long-term losses in regulating and cultural services are experienced locally. C) long-term gains are often local, while short-term losses in regulating and cultural services are experienced regionally. D) long-term gains are often regional, while short-term losses in regulating and cultural services are experienced locally.

Environmental & Atmospheric Sciences

The bottoms of clouds are often gray because

A) precipitation is imminent. B) they are over dark portions of the Earth's surface. C) the bottoms of clouds are denser than the tops, and thus absorb more light. D) multiple scattering has removed most light before it reaches the bottom of the cloud. E) droplets or crystals within the cloud have dispersed most of the available light.

Environmental & Atmospheric Sciences

Which of the following elements are in the same group as silicon (Si)?

A. P B. C C. B D. As E. none of the above

Environmental & Atmospheric Sciences

Why is the Great Lakes and Corn Belt region often referred to as America's Heartland?

What will be an ideal response?

Environmental & Atmospheric Sciences