Which of the following do NOT lay eggs?
a. monotremes
b. marsupials
c. reptiles
d. birds
Ans: b. marsupials
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A plasmid may
A) replicate independently of the chromosome. B) be transferred cell-to-cell during conjugation. C) be integrated into the chromosome. D) replicate independently of the chromosome, integrate into the chromosome, or be transferred cell-to-cell during conjugation.
Animals that have the four basic characteristics of chordates plus a vertebral column are
a. invertebrates. b. hemichordates. c. cephalochordates. d. vertebrates.
Constipation can be caused by
a. emotional stress. b. a low-fiber diet. c. a sedentary lifestyle. d. dehydration. e. all of these.
Independent assortment refers to which of the following statements?
A) The pole that any one chromosome moves toward is completely independent of the movement of the other 45 chromosomes in humans. B) The position where crossing over occurs is random. C) The sperm that fertilizes the egg is selected at random. D) A maternal chromosome may move toward either pole while the paternal homologue moves toward the other. E) None of the choices is correct.