Taphonomists would probably conclude that hominins had scavenged meat from an animal carcass they did not kill if fossil animal bones:

Why would a drug the damages capsids treat a viral infection

What is true of sea slugs in these orders

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.