The genus Desulfovibrio ________.
A. uses sulfate as a terminal electron acceptor during anaerobic respiration
B. produces H2S
C. is a strict anaerobe
D. All of the choices are correct.
Answer: D
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The primary action in hand washing that prevents the distribution or transmission of microor-ganisms is:
a. the amount of soap used. b. the temperature of the water. c. the mechanical action of rubbing. d. the chemical activities in the soap.
The chemical linkages that exert an attractive force over the greatest distance are ____
a. polar covalent bonds b. van der Waals forces c. ionic bonds d. hydrogen bonds e. nonpolar covalent bonds
The stacks of double membrane structures found in chloroplasts are
The passage of an arthropod through stages from egg to adult is called
A. metamorphosis. B. succession. C. graduation. D. evolution. E. differentiation.