What fraction of all of the organic carbon on earth results from microbial fixation of carbon dioxide in the oceans?
A) about 3/4
B) about 1/2
C) about 1/4
D) about 1/8
Correct Answer:
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Q3: Cyanobacteria such as Synechococcus and Prochlorococcus are
Q8: The possible effect of failing to limit
Q12: Most microbes that inhabit estuaries are _.
A)halophilic
B)halotolerant
C)halophobic
D)halovariable
Q14: In marine and freshwater environments,the penetration of
Q15: Winogradsky columns _.
A)are typically used to isolate
Q17: The oceans contain about _ percent of
Q19: The solubility of oxygen in water will
Q19: The discharge of high levels of microbial
Q20: The initial degradation of cellulose that initiates
Q26: Much of the loss of biologically available
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