The graph below shows what happens during 2 chemical reactions A and B Which of the following BEST describes this graph?
A. Reaction A's rale of reaction increases as pH increases
B. The optimum pH for reactions A and B is around 4.5.
C. Reaction Ahas an optimum pH of approximately 3.
D. The reactivity of B increases at a pH greater than 7.

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.