Carbon is introduced into the atmosphere by all
EXCEPT which of the following means?
a. respiration
b. volcanic eruptions
c. burning of fossil fuels
d. wind erosion of rocks
e. combustion of wood
Answer: d
Biology & Microbiology
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A. restriction endonucleases B. reverse transcriptase C. RNA polymerase D. DNA ligase
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World human population in 2011 was approximately
A. 5 billion. B. 800 million. C. 10 billion. D. 7 billion. E. 670 million.
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A hypothesis is a
A.) definite answer to a given problem. B.) concluding statement. C.) testable possible explanation of an observation. D.) proven statement.
Biology & Microbiology
Plant cells can communicate with each other using what structure?
Biology & Microbiology