He process represented at step A of Figure 48-1 is referred to as:
a. filtration.
b. secretion.
c. excretion.
d. deamination.
e. elimination.
D
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Which of the following characteristics distinguished T cells from B cells?
A. B cells produce immunoglobulin while T cells do not. B. B cells originate in the bone marrow while T cells do not. C. B cells form memory cells while T cells do not. D. B cells are lymphocytes while T cells are not.
Blue flower color (B allele) is dominant to white (b allele). If a population of plants in Hardy-Weinberg equilibrium contains white flowers (bb) at a frequency of 0.04, what is the frequency of the blue flower allele (B)?
A. 0.2 or 20% B. 0.64 or 64% C. 0.32 or 32% D. 0.8 or 80% E. 0.96 or 96%
The internal pH of most cells is near neutral. This allows
a. water to break down into H+ and OH-. b. enzymes within the cells to act at peak efficiency. c. the buffers produced within the body to affect these cells. d. enzymes outside of these cells to function. e. rapid fluctuations between acidic and basic conditions within the cells.
If you were grading an exam about water, which statement would lose points?