For an organism to belong to class mammalia, it should have A . spinal cord
B . ear drum
C . limbs
D . mammary glands

Cells are adapted to preform specific functions. which of the following terms refers to this capability?

Based on the observation that only male crickets produce a song, you hypothesize that a male's song is a form of communication to potential mates. you set up a simple experiment to test this hypothesis. in the laboratory, you place a male snowy tree cricket in enclosure a, which is adjacent to enclosureb. in enclosure b, you place other insects, one at a time, and observe their responses to the male's song. the enclosures are designed so that the two insects being tested cannot see or smell each other, but sound is transmitted from enclosure a to enclosureb.

Why did the federal government end its support of yucca mountain as a site for long-term storage of nuclear water