Diet and exercise are both considered factors in cancer risk. exercise is good for just about everything, but what should you eat?
a. a healthy mix of red meat and fruits and vegetables
b. foods that are white
c. red meat and foods with high fiber
d. fruits and vegetables and saturated fats
e. fruits, vegetables, and high fiber grains

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.