How many primers are necessary in order to utilize PCR?
A) 0
B) 1
C) 2
D) 3
B
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Based on atomic size, which would you expect to be more soluble in water: helium, He, or nitrogen, N2?
A) Although He is smaller, its outer orbital is filled and the atom will have little attraction to the water molecules. B) Since He atoms are smaller, more of them can fit into solution, so it has a higher solubility in water. C) Nitrogen atoms are bigger and so nitrogen molecules should be more soluble in water due to greater dipole-induced dipole attractions. D) He atoms are bigger and so helium molecules should be more soluble in water due to greater dipole-induced dipole attractions.
What was the discovery made by Fritz Haber, and why was this a mixed blessing? What will be an ideal response?
As the oceans change temperature, many marine animals ________.
A. migrate toward the gyres B. migrate poleward and deeper C. migrate toward the Equator D. migrate toward the coast E. migrate poleward and shallower
How many enclaves are in the border region between India and Bangladesh?
A) less than 10 B) 25 C) 100 D) more than 250 E) none of the above