Which of the following is a function of the skeletal system?
Production of red blood cells
Regulation of body temperature
Removal of metabolic waste
Synthesis of vitamin D
A. Production of red blood cells
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What role, if any, did polysaccharides play in chemical evolution?
A) Polysaccharides catalyzed chemical reactions. B) Polysaccharides used complementary pairing between monosaccharides to copy themselves. C) Glycosidic linkages formed spontaneously between monosaccharides. D) Polysaccharides played little, if any, role in chemical evolution.
Direct microscope counting of stained cells is an accurate method for calculating the exact number of cells in a sample
Indicate whether the statement is true or false.
A stretch receptor is classified as a
a. chemoreceptor. b. mechanoreceptor. c. photoreceptor. d. thermoreceptor. e. all of these
The time it takes for half of a radioisotope's atoms to decay ____.
A. cannot be calculated B. is used to construct the geologic time scale C. is its half-life D. is the same for uranium 238 and carbon 14 E. is highly variable