Populations of organisms that exhibit a high degree of variation have a greater chance for survival than populations of organisms that show little variation.

After fertilization, which type of cellular division is responsible for the growth and development of a complex, multicellular organism?

Which statement best describes the role of religion and culture in ancient medicine?

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.