Among the 21 species of sharks assessed by SSG,A．10 are assessed as near threatened.B．5 ar

Ecologists have studied the four chipmunk species that occur on the eastern slope of the S

The most aggressive of the four eastern－slope species is the lodgepole chipmunk, a feisty

All of the following contribute to the extinction of species EXCEPTA．hunting.B．pollution.C

Among almost seven hundred species of bamboo, some are fully grown at less than a foot hig

We can t emphasize ______ the importance of air and water for the survival of all species.

The Endangered Species Act of 1973 was enacted ma