Which grouping of organisms is considered to have the greatest amount of diversity?
a. Kingdom
b. Species
c. Domain
d. Order
Ans: c. Domain
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If a cell has a greater concentration of solute than its environment
A. the cell is hypertonic to the environment. B. the cell is isotonic to the environment. C. the cell is hypotonic to the environment. D. the cell will not experience a net gain or loss of water. E. the cell will crenate.
The almost complete loss of the American chestnut tree to the chestnut blight fungus had ____ ecological impact on
the moderately diverse Appalachian woodlands of which it was formerly a part. a. little b. great c. moderate d. undetectable e. detectable
A viral species is not defined on the basis of the disease symptoms it causes. The best example of this is
a. polio. b. rabies. c. hepatitis. d. chickenpox and shingles. e. measles.
When does homologous recombination most likely occur in order to flawlessly repair double-stranded DNA breaks?
A. when the damage is overlooked by the fast-acting mismatch repair system B. before DNA is replicated, to avoid propagating the error C. whenever a double-strand break is detected D. after the cell's DNA has been replicated E. after the broken ends have been "cleaned" by a nuclease