A mother has blood type A and her son has blood type O. Which blood types are possible for the father?

Which situation is an example of not doing work? lifting a couch throwing a baseball running up stairs carrying a box

How water is moving through the ecosystem ?

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.