In mammalian defenses against invading pathogens, all of these are considered nonspecific defense mechanisms EXCEPT
A. the skin.
B. antimicrobial proteins (e.g., interferon).
C. the inflammatory response.
D. acquired immunity.
E. mucous membranes.
Answer: D
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Which of the following is the primary site of nutrient absorption in the mammalian digestive system?
A. pharynx B. stomach C. small intestine D. large intestine E. pancreas
________ are proteins that promote depolymerization of extant microtubules at the ends.
Fill in the blank(s) with the appropriate word(s).
Turgor is most directly related to the plant cells'
A. total water potential. B. solute potential. C. osmosis. D. gravity potential. E. pressure potential.
To determine the nucleotide sequence in DNA, scientists now use
a. electron microscopy. b. antibiotic resistance. c. automated DNA sequencing. d. radioactive tracers. e. viruses.