The diagram to the right illustrates an embryonic stage of two organisms. which of the following can be determined by observing the embryos shown in the diagram? a) the organisms share a common ancestors b) the organisms belong to the same genus c) the organisms are native to the same geographic areas d) the organisms will grow into anatomically similar adults

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.

Which is an example of a vestigial structure? a: paw of a lionb: wing of a birdc: appendix of a humand: tail of a cat(i think it's a but i'm not sure)

Light sensitivity in euglena is provided by the