During aerobic respiration, what molecule is degraded for the formation of acetyl coenzyme A?
a. NAD
b. FADH
c. glucose
d. pyruvate
e. coenzyme A
d
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Explain the difference between plasmogamy and karyogamy
What will be an ideal response?
Evidence from Stanley Miller's experiments and evidence from carbonaceous chondrites collected from meteorites, taken together, most directly support the contention that
a. life can arise under conditions of extreme heat or cold. b. organic molecules can be synthesized by natural chemical processes. c. life did not arise on earth, but rather arrived from another planet by meteorite. d. living organisms are required to produce complex organic compounds. e. organic compounds require gravity for their formation.
The autonomic nervous system
a. is part of the peripheral nervous system. b. is part of the central nervous system. c. relays commands to smooth muscles. d. is under involuntary control. e. is described by more than one of these
Which of the following list of features describes the molluscs and bivalves but not the annelids?
A. Reduced cephalization, contain a muscular foot and a mantle, may possess a hard outer shell. B. Lack of cephalization, contains circular muscles that enable them to move, may possess a hard outer shell, and have a complete digestive system. C. Lack of cephalization, every member of the group will have a hard outer shell as well as a complete digestive system. D. Presence of cephalization, contain a muscular foot and a mantle, may possess a hard outer shell and have a complete digestive system. E. None of these lists describes the molluscs and bivalves but not the annelids.