Lyme disease is a bacterial infection transmitted to humans from ticks. which of the following approaches would be the most effective to treat lyme disease?
a. destroy the grass that the ticks live in
b. destroy the ticks that have been infected with the bacteria
c. vaccinate people for the disease
d. prescribe antibiotics to destroy the bacteria

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.