What effect does exercise have on the nervous system? a. prolonged exercise degenerates the nervous system. b. increased blood flow reduces nerve sensitivity. c. repetitive motion develops nerves and nerve endings. d. higher body temperature impairs nerve message transmissions.

Which of the following is characteristic of the lytic cycle? a) viral dna is incorporated into the host genome.b) the viral genome replicates without destroying the host.c) a large number of phages are released at a time.d) the virus—host relationship usually lasts for generations.