Most carbon dissolved in the ocean is in the form of

a. carbon dioxide.
b. carbon monoxide.
c. carbonic acid.
d. bicarbonate and carbonate.
e. carbon tetrachloride.


D

Biology & Microbiology

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Some bacteria in the human intestine aid in the digestion and absorption of nutrients, while utilizing these nutrients themselves as well. This is an example of:

A. commensalism. B. mutualism. C. parasitism. D. predation. E. an antagonistic interaction.

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Which of the following provides the eye with its best defense against microorganisms?

A. Conjunctiva B. Lymphocytes C. Eyelids D. Tears E. Eyelashes

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In the reaction 6CO2 + 6H2OC6H12O6 + 6O2 carbon dioxide is one of the

a. reactants b. products c. enzymes d. catalysts

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The medium used for the indole test is

A. tryptone water B. indole broth C. MR/VP medium D. Ornithine broth E. Tryptophan broth

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