Polycythemia is a disease which causes an excessive number of red blood cells to be produced.

The disease is the result of a faulty gene. How would the flow of blood be affected by this

condition?

•Blood flow rate will increase.

•Blood viscosity will decrease.

•Blood pressure will increase.

•Blood volume will decrease.

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.