What was the significance of the Luetgert murder case of 1897? Why was this a turning point for forensic anthropology?

Which of these resources is used worldwide to make construction products, pottery, and porcelain

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 level of taxonomy has the fewest organisms?