Ascientist is examining the function of macromolecules in a cell. she notices that movement of large molecules into and out of the cell is disrupted when she damages one specific type of macromolecule.

which macromolecule has she most likely damaged?
a carbohydrate
a steroid
a nucleic acid
a protein

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.