Describe the structure of the cell membrane.

Most animal cells membranes have proteins that pump ions out of the cell and potassium ions into the cell

Which kingdom includes some organisms that have no nucleus and can live in an environment with an extremely high salt content

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.