Which of the following statements best describes tobacco? a. it is an illegal drug. b. it is only legal for people age 18 and older. c. it is only legal for people age 21 and older. d. it is always legal to use tobacco.

Which of the following foods would be the best choice for someone who's lactose-intolerant?   a.  frozen yogurt    b.  strawberry sorbet    c.  cheesecake    d.  chocolate ice cream

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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.