Bones are _____
a. mineral reservoirs
b. skeletal muscle's
c. sites where blood cells form (some bones only)
d. all of these
D
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Many normal genes that have important functions in cells sometimes acquire mutations that cause the products of these genes to have negative effects, including the development of cancer. These genes are called:
A. oncogenes. B. proto-oncogenes. C. tumor suppressor genes. D. viral genes.
The entire process of producing two cells from one
cell a. starts with prophase. b. ends with cytokinesis. c. results in the equal distribution of organelles between cells. d. occurs only in multicellular organisms. e. starts with prophase and ends with cytokinesis.
Phosphodiesterase catalyzes the conversion of:
a. IP3 to PIP2. b. GDP to GTP. c. cAMP to AMP. d. calcium to calcium-calmodulin. e. a protein to a phosphorylated protein.
An animal that relies on a digestive tract for digestion breaks down food by
a) intracellular digestion only b) both intracellular and extracellular digestion c) extracellular digestion only d) neither intracellular nor extracellular digestion