Which of the following is true of primers that are used by the cell during DNA replication?
A) They are made out of DNA.
B) They are made out of RNA.
C) They are made out of either DNA or RNA.
D) They are proteins.
B
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Can you list other methods and criteria that can be used for this purpose?
What will be an ideal response?
Deep incised river canyons most likely form through some combination of tectonic ________ and climate change that resulted in ________ precipitation
A) uplift, more B) uplift, less C) subsidence, more D) subsidence, less
On the average, how much of the Sun's energy that is intercepted by Earth is reflected back to space?
10% 20% 30% 40%
The jet streams in the United States generally flow from west to east because of
A) ocean currents off the Pacific and Atlantic coastlines. B) convection currents between the troposphere and stratosphere. C) rotation of the Earth. D) high pressure systems generated by the sun striking the North American continent.