A common debate in biology centers on whether or not viruses are living things. What is a plausible reason that they could be considered living?
a. Because they breathe, like all living things.
b. Because they utilize ATP and break down food, like other living things.
c. Because they can exist in a dormant state.
d. Because they grow, like other living things.
e. Because they contain either DNA or RNA, which are only found in living things.
Ans: e. Because they contain either DNA or RNA, which are only found in living things.
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Which of the following is true of the life cycle of mosses?
A) The haploid generation grows on the sporophyte generation. B) Spores are primarily distributed by water currents. C) Antheridia and archegonia are produced by gametophytes. D) The sporophyte generation is dominant. E) The growing embryo gives rise to the gametophyte.
If an X-linked recessive gene is expressed in 4 percent of the men, what proportion of women would
express the recessive trait? What will be an ideal response?
Which of the following is properly matched?
a. osteoblasts; bone breakdown b. osteocytes; initial bone formation c. osteoclasts; initial bone formation d. osteoclasts; bone breakdown e. osteoblasts; imprisoned in bony matrix
What type of cell found in the skin and mucosal linings secretes histamine?
A) basophil B) monocyte C) dendritic cell D) macrophage E) mast cell