Which of the following does not contribute to the increasing levels of methane in the atmosphere?
A. Methane production in termites
B. Methane production beneath an aerobic water column
C. Methane production in rice paddies
D. Methane production at sewage treatment plants
Answer: B
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In the figure, at the arrow marked II, what enzyme(s) are being utilized?
A) reverse transcriptase B) viral DNA polymerase C) host cell DNA polymerase D) host cell RNA polymerase E) host cell DNA and RNA polymerases
Which of the following plants CANNOT participate in nitrogen fixation?
a. beans b. clover c. peanuts d. alders e. wheat
Double strand breaks are generally readily repaired.
a. true b. false
In the CRISPR system, the targeted DNA sequence is
A. in the palindromic repeats. B. in the cas gene. C. between CRISPR regions. D. in the spacer of a CRISPR region. E. in a vector.