The Monoplacophora
a. Lack a shell
b. Live in fresh water
c. Lack a foot
d. Have several internal organs that are serially repeated
e. All of the choices are correct
Answer: d. Have several internal organs that are serially repeated
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Which pair correctly associates a physiological process with the appropriate vitamin?
A) blood clotting â€" vitamin C B) normal vision â€" vitamin A C) synthesis of cell membranes â€" vitamin D D) production of white blood cells â€" vitamin K
Unlike plant cells, animal cells move during development. Which of the following terms describes the reorganization of undifferentiated cells that results in the formation of an embryonic structure with multiple layers?
A. blastulation B. gastrulation C. organogenesis D. cleavage
When Ron Evans generated transgenic mice in which the gene PPAR-delta was constituitively active (i.e., always expressed), he found that these mice showed a shift from fast glycolytic fibers to slow oxidative fibers. One consequence of this change was that the transgenic mice
A. showed greater endurance in a running test. B. showed less endurance in a running test. C. had leg muscles with lower mitochondrial and capillary densities than wild-type (nontransgenic) mice. D. were more likely to become obese than wild-type (nontransgenic) mice. E. had muscles that were not as red as those of wild-type (nontransgenic) mice.
The radioactive isotope 32P labels the T2 phage's _____.
Fill in the blank(s) with the appropriate word(s).