Regulatory enhancers can be:
a. added through evolution.
b. lost through evolution.
c. be associated with specific body parts.
d. all of the above.
D
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A bacterial artificial chromosome (BAC) is different from a plasmid vector because it:
A. lacks an origin for replication in bacteria. B. accommodates much larger fragments (100–300kb). C. has a higher copy number than the plasmid vector. D. has only selectable markers with which to detect its presence in cells. E. lacks par genes that the plasmid has to maintain its high copy number.
Which muscle tissue type will move and maintain balance within the body?
a. Cardiac b. Skeletal c. Skeletal and cardiac d. Smooth and cardiac e. Smooth
The gametophyte is the dominant stage in the life cycle for which of the following plant groups?
a. club mosses b. whisk ferns c. ferns d. horsetails e. liverworts
If human gametes were diploid
a)the products of fertilization would have the same number of chromosomes as their parents. b)the products of fertilization would have fewer chromosomes than their parents. c)fertilization could not occur. d)the products of fertilization would have more chromosomes than their parents. e)the embryo would be diploid.