Scientists place great confidence in cell theory, yet it has not been evaluated using every living thing on the planet. What piece of evidence would most likely cause scientists to decide that cell theory would need to be revised? A. An organism was found with tissues that contained no cells.

B. A cell was found that could continue to divide and reproduce endlessly.

C. An animal cell was found that could harness solar energy, similarly to plant cells.

D. A sample of cells was found that used something other than DNA as hereditary material.

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.