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
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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.
Which of the following provides the eye with its best defense against microorganisms?
A. Conjunctiva B. Lymphocytes C. Eyelids D. Tears E. Eyelashes
In the reaction 6CO2 + 6H2OC6H12O6 + 6O2 carbon dioxide is one of the
a. reactants b. products c. enzymes d. catalysts
The medium used for the indole test is
A. tryptone water B. indole broth C. MR/VP medium D. Ornithine broth E. Tryptophan broth