How many recombination events result from cutting and pasting four DNA backbones?
a. four
b. three
c. two
d. one
Answer: d. one
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How would the loss of p53 activity affect a cell?
A. The G1/S checkpoint would be unregulated. B. DNA damage could accumulate. C. CDK activity would be unregulated. D. All of the above are correct.
14C is a radioisotope of carbon that decays into ____
a. potassium b. oxygen c. carbon dioxide d. nitrogen e. sulfur
Random dispersion of individuals in a
population occurs when habitat conditions are ____, resource availability is ____, and individuals or pairs of individuals ____ one another. a. random; scarce; either attract or avoid b. clumped; fairly steady; neither attract nor avoid c. nearly uniform; random; neither attract nor avoid d. nearly uniform; fairly steady; neither attract nor avoid e. clumped; scarce; either attract or avoid
Which situation would be most likely to form a fossil under normal environmental conditions?
A. A jellyfish that died in an estuary. B. A slug that died in leaf litter. C. A bird that died and fell to the forest floor. D. An elephant that died at the edge of a waterhole.