How many different kinds of nucleic acid are there?
A) 1
B) 2
C) 3
D) 4
B
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The daily mean temperature:
A) is the average of 24 temperatures taken an hour apart. B) is the difference between the day's high and low temperature. C) is the average of the maximum and minimum temperature for a given day. D) varies little from month to month.
The subtropical high pressure cells of both hemispheres play a major role in the location of the world's deserts
a. True b. False Indicate whether the statement is true or false
Big Bang Theory suggests that prior to the Big Bang, the universe was ________
A) in a very hot and massive state B) nothing C) a giant neutron star D) a collapsed supernova
Municipal sewage treatment plants are very effective at breaking down human waste prior to discharging the wastewater into rivers. Why then, do so many U.S. plants continue to cause water quality problems in rivers?
A. all of the answers listed here. B. plants are not very effective at removing hazardous chemicals. C. plants are not very effective at removing heavy metals. D. combined sewage and stormwater systems release raw sewage during large rain events. E. plants are not very effective at removing pharmaceuticals.