Biodiversity is important in that some organisms and ecosystems play a role in breaking down pollutants.

The gradualistic model of speciation is supported by many transitional forms.

Directional selection in the modern horse is demonstrated by

Jacob is studying a population of wrens in Michigan. During one severe winter, 5% of the birds died due to starvation and cold temperatures. Severe weather is an example of

The increased efficiency of fishing has led to

What influence did the writings of Thomas Malthus have on Darwin’s ideas of natural selection?

Which of the following types of compounds have been implicated in ozone depletion?

Two organisms present in the same genus are usually more closely related to each other than to organisms in other genera.

Chlorofluorocarbons (CFCs) are damaging to the world’s freshwater supply.

Prior to Darwin, people considered variation among individuals as “imperfections” that served no particular purpose.