An instrument used to record the electrical impulses of the brain is called an:

15 ! come and answer! a(n) is the general term for an infectious disease that has spread across a city, region, or country.

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.

Draw the conjugate acid for the following base. remember to include charges and non-bonding electrons where necessary.