Which of the following is true of a nanometer?
A) A nanometer is about the size of a common bacterial cell.
B) A nanometer is one millionth of a meter.
C) A nanometer is equivalent to 10 Angstroms (Å).
D) The nanometer is the most common measurement used in measuring whole cells.
E) None of the above.
Answer: C
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The processes listed below represent major chemical pathways in
photosynthesis. Respond to statements 80–84 with reference to these five processes. a. light-dependent reactions b. chemosynthetic reactions c. carbon dioxide fixation d. Calvin-Benson cycle e. C4 pathway D 80. This leads to the formation of a glucose-6-phosphate from two molecules of phosphoglyceraldehyde. M 81. In this process carbon dioxide is incorporated first into an unstable intermediate compound and then into phosphoglycerate. E 82. This yields NADPH as well as ATP. M 83. This is a carbon-fixing system that precedes the Calvin-Benson cycle in some plants. M 84. PGAL molecules are formed from the reaction of PGA molecules with ATP and NADPH in this pathway.
Chronic stress:a
is associated with elevated levels of glucocorticoids. b. may lead to the excessive stimulation of neurons. c. increases blood flow to the brain, especially the hippocampus. d. results in lower levels of epinephrine and norepinephrine. e. promotes the linear growth of the skeleton
A population of lizards lives in a rocky area next to a desert. Some lizards are light colored and blend into the sand. Others are dark and blend into the rocks. What is likely to happen to this population of lizards over time?
A. They may remain one species as a result of stabilizing selection. B. They may remain one species as a result of directional selection. C. They may remain one species as a result of disruptive selection. D. They may evolve into two separate species as a result of disruptive selection. E. They may evolve into two separate species as a result of directional selection.
Which type of fish is likely to produce the smallest number of progeny from each mating?
A. An ovoviparous species B. An oviparous species C. A viviparous species