Which of the following describes positive feedback? Select one:

A. A loss of output from the body’s receptors.

B. The response of the body to increased temperatures.

C. An event that reduces the effects of a stimulus.

D. An event that enhances the original stimulus.

Examine the two squirrel populations in the accompanying figure. the populations are separated by a geographic barrier. if after a long period of time the two species are no longer separated, what evidence is needed to determine if speciation has occurred? the figure shows two populations of squirrels separated by a geographic barrier. examine the two squirrel populations in the accompanying figure. the populations are separated by a geographic barrier. if after a long period of time the two species are no longer separated, what evidence is needed to determine if speciation has occurred? the figure shows two populations of squirrels separated by a geographic barrier. polyploidy is creating new species. the two populations are not interbreeding freely. hybrid offspring of the two populations begin to appear. one species will increase into a population size twice as large as the other species.

Which process of living things produces water that enters the water cycle

The variation among individuals, on which natural selection acts