All of the following are animal mechanisms to cope with the problem of water balance EXCEPT
A. coupling of water/salt removal with metabolic waste removal.
B. secretion of regulatory hormones into the tubule.
C. kidneys used as filtering organs.
D. passage of water and waste of the body across a layer of cells into a tubular structure.
E. contractile vacuoles.
B. secretion of regulatory hormones into the tubule.
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Substrate level phosphorylation ____
a. involves the direct transfer of a phosphate group from a substrate b. requires the presence of oxygen c. requires the presence of NADH d. produces most of the ATPs during aerobic respiration e. is not part of fermentation pathways
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How many phosphodiester bonds are needed to join 50 deoxyribonucleotides in a DNA strand?
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