At any given time, what percentage of the body's capillaries have blood flowing through them?
A) 5-10%
B) 20-25%
C) 40-50%
D) 85-90%
Answer: A) 5-10%
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Name the fluid-filled interior of the chloroplast.
A. Stomata B. Thylakoids C. Grana D. Stroma
Why is Taq polymerase used in a polymerase chain reaction (PCR)?
A. Taq polymerase has proofreading activity and thus makes fewer errors than other DNA polymerases. B. Unlike other DNA polymerases, Taq polymerase is heat stable and survives the 94 degree denaturation step in PCR. C. Unlike other DNA polymerases, Taq polymerase is not inhibited by dideoxy nucleotides. D. Taq polymerase can produce DNA from an RNA template, unlike other DNA polymerases. E. Taq polymerase is more efficient than other DNA polymerases.
Some people say that China’s number one export is air pollution. This is because
a. large countries have a higher population, and therefore, more cars and machinery to produce pollutants. b. many countries do not have monitored emission standards. c. wind patterns bring smog from China to the West Coast of the United States. d. all of these
An air temperature rise of 10?C will typically ____ evaporation from leaves
a. completely eliminate b. double the rate of c. mostly eliminate d. triple the rate of e. quadruple the rate of