Which symptoms indicates that someone has stress? A. The heart beat speeds up
B. Adrenaline decreases the sugar in the blood
C. Muscles become more relaxed
D. The blood vessels contract

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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.

Active immunity refers to: a. the defenses people are born with. b. temporary immunity granted from another source. c. immunity gained through immunization and exposure to diseases. d. natural immunities that protect humans from other animal diseases