Most nutrients are absorbed across the epithelium of the
A. colon.
B. stomach.
C. esophagus.
D. small intestine.
E. large intestine.
D. small intestine.
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The experiments of which of the following
researchers clearly distinguished DNA and NOT protein as the hereditary material? a. Pauling b. Hershey and Chase c. Griffith d. Watson and Crick e. Avery
The bran of the seed contains primarily
a. lipopolysaccharides. b. proteins and vitamins. c. fiber and minerals. d. fructose. e. none of these.
Which of the following is the correct explanation for the data?
(A) At higher osmolarity, lower rates of contraction are required because more salt diffuses into the paramecia. (B) The contraction rate increases as the osmolarity decreases because the amount of water entering the paramecia by osmosis increases. (C) The contractile vacuole is less efficient in solutions of high osmolarity because of the reduced amount of ATP produced from cellular respiration. (D) In an isosmotic salt solution, there is no diffusion of water into or out of the paramecia, so the contraction rate is zero.
Which of the following are true statements regarding the volume of tissue nitrogen excreted during the N2 washout test for measuring functional residual capacity (FRC)
1. It is not a factor. 2. It varies with the length of the test. 3. It varies with the weight of the patient. 4. It cannot be correct. Select one: a. 1 only b. 2 and 3 only c. 2, 3, and 4 only d. 4 only