Which of the following organisms was
introduced in the United States in order to
control the population of RIFAs?
a. houseflies
b. fruit flies
c. phorid flies
d. hanging flies
e. caddis flies
C
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Explain why X-ray diffraction was important in the study of DNA structure and describe the procedure used in X-ray diffraction
What will be an ideal response?
Why is there very little physical evidence of life from rocks of the Archaean eon?
a. Those rocks have been deeply buried in most parts of the world. b. Those rocks occupy inaccessible areas of mountainous regions. c. Those rocks have been greatly eroded in most parts of the world. d. Those rocks occupy the polar regions and are thus covered by glaciers. e. Those rocks have been deposited in oceanic trenches deep in the oceans.
The global patterns of atmospheric circulation and precipitation occur because of
A. rising masses of warm air and sinking masses of cool air. B. the greenhouse effect. C. global differentials in sea surface temperature. D. the cooling of the land. E. winds blowing off of the world's major mountain chains.
You cut some sheep DNA and some plasmid DNA with the same restriction enzyme. The plasmid contains an AmpR gene and a lacZ gene. You mix together the fragments of sheep DNA and the linearized plasmid. You transform bacteria with your mixture, and plate the bacterial cells on growth media containing the antibiotic ampicillin and X-gal (the substrate of beta-galactosidase). You need to pick some bacterial colonies that contain recombinant plasmids. Which colonies do you choose?
A. Any colony; if they grow on the media they are recombinant. B. The blue colonies; any cells containing eukaryotic (sheep) DNA will be blue. C. The white colonies; only cells that contain a recombinant plasmid will be white. D. The large colonies; large colonies are more resistant to the antiobiotic and thus more likely to contain a recombinant plasmid. E. Any colony, all colonies will contain plasmids; it requires additional testing to determine if the plasmid is recombinant.