When a usable organic electron donor is present, sulfate serves as a terminal electron acceptor during anaerobic respiration by ________.
A. Archaeoglobus
B. Desulfonema
C. Desulfovibrio
D. All of the choices are correct.
Answer: D
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Why would environmentalists nurture baby California condors by the use of puppets?
a. If they were directly touched by humans, other condors might detect a human odor. b. They need to learn certain behaviors before they are free in the environment. c. There are not many adult condors available to nurture them. d. all of these
At what partial pressure of oxygen do half the
heme groups in human blood have oxygen bound? a. 30 mm Hg b. 100 mm Hg c. 70 mm Hg d. 104 mm Hg e. all of these
The definitive host for Plasmodium vivax is
a. human. b. Anopheles. c. a sporocyte. d. a gametocyte.
_____ pigments protect many phototrophic organisms from photochemically produced singlet oxygen
Fill in the blank(s) with the appropriate word(s).