When do random or spontaneous mutations happen. during cell devision. when cells are exposed to hazardous chemical. when cells are exposed to certain viruses. when cells are exposed to radiation

What substance acts to prevent sudden ph changes in bodily fluids?

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.

What is the membrane that sheath of schwann cell containing cytoplasm and nucleus that encloses myelin