Which cells in a multicellular organism generally contain inactive telomerases?
a. somatic cells
b. embryonic cells
c. germ line cells
d. immune cells
Ans: a. somatic cells
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Which of the following statements is true regarding the RNA of plant viruses? Select all
A. Outside of replication, the RNA of plant viruses is typically single-stranded. B. Outside of replication, the RNA of plant viruses is typically double-stranded. C. Plants cleave viral double-stranded RNA to form small-interfering RNAs. D. Plants cleave viral single-stranded RNA to form small-interfering RNAs. E. Plant viruses contain only single-stranded DNA, not RNA.
In the illustration above showing the haploid phase in the life cycle of a fern, what part represents the male
gametangium? a. 1 b. 2 c. 3 d. 4 e. 5
John was planning to ask Susan to marry him. When he saw Susan kissing another man at a party, he was quite upset. In this situation, John's seeing Susan kissing another man is _____, and it illustrates _____.
A. a stressor; distress B. eustress; a stressor C. distress; a stressor D. astressor; eustress
Which is NOT a possible outcome from infection by an animal virus?
a. avirulent infection b. persistent infection c. latent infection d. transformation