Lambda DNA is replicated by
a. recombination to create concatemers.
b. rolling circle replication.
c. bidirectional replication.
d. transduction.
Answer: B
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An important role of bacteria is:
a. primary producers. b. decomposers. c. nitrogen fixation. d. all of the above
In the experiment with peacock butterflies the working hypothesis is that ____
a. mimicry confuses both predator and prey b. mimicry protects butterflies from being eaten by predatory birds c. birds are capable of learning d. birds are agents of evolution e. unpalatable species display distinctive wings
Which situation is most likely to decrease genetic variation?
A. directional selection B. mutation C. stabilizing selection D. diversifying selection
Why is fiber an important part of a healthful human diet?
A) It is easily digested into monosaccharides, which are used for energy. B) It may decrease the risk of certain types of cancers. C) It increases the amount of HDL and LDL cholesterol in the body. D) It contains more energy, gram for gram, than any other nutrient.