What structure best represents a polymer?
A. A fatty acid.
B. A monosaccharide.
C. A nucleotide.
D. An amino acid.
E. A protein.
E. A protein.
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The organization of the vasa recta around the loop of Henle:
A. allows urea to be concentrated in the distal convoluted tubule. B. allows water to be maximally reabsorbed from the distal convoluted tubule. C. allows the concentration gradient established by the loop of Henle to be maintained. D. allows urea to be concentrated in the distal convoluted tubule and allows the concentration gradient established by the loop of Henle to be maintained. E. allows water to be maximally reabsorbed from the distal convoluted tubule and allows the concentration gradient established by the loop of Henle to be maintained.
When using a light microscope to view a cell you obtained from scraping under your fingernails, you notice that the cell lacks a nucleus; therefore, you conclude that the cell must be a type of __________ cell.
A) plant B) eukaryotic C) fungal D) prokaryotic
Radioactivity can destroy cancerous tissue but not healthy tissue
Indicate whether the statement is true or false.
Atherosclerosis is
a. a clot in an artery. b. build up of plaque in an artery. c. build up of plaque in a vein. d. high blood pressure. e. low blood pressure.