Which of the following most clearly defines the process of pollination?
a. the germination of a seed
b. the attraction of an insect to a flower
c. the transfer of pollen grains to the pistil
d. the joining of egg and sperm cells
e. food is broken down and energy is released
Ans: c. the transfer of pollen grains to the pistil
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The inheritance pattern in which the mother provides gene products to the developing egg cells is called
A. X inactivation. B. extranuclear inheritance. C. genomic imprinting. D. linkage. E. maternal effects.
Which of the following characteristics is not associated with metastasis?
A. The internal cytoskeleton is disorganized. B. The cancer cells lack intact actin filament bundles. C. Cancer cells produce proteinase enzymes. D. Invasive cancer cells are abnormally shaped. E. The low oxygen content in the middle of a tumor may turn on genes for angiogenesis.
Drug addiction
a. is a form of chemical dependence. b. may result from habituation and increased tolerance. c. may result in deterioration of personal and professional relationships. d. may result in risk taking to obtain or use the drug e. includes all of these
Labeled, known, short stretches of DNA used to detect a specific sequence of nucleotides in a mixture are
A. gel electrophoresis. B. genetic engineering. C. gene probes. D. recombinant DNA. E. biotechnology.