Scrubbing or immersing the skin in chemicals to reduce the numbers of microbes on the skin is ________.
A. sanitization
B. disinfection
C. degermation
D. sterilization
Answer: C
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Which of the following would be LEAST likely to affect osmosis in plants?
A) temperature B) a difference in solute concentrations C) receptor proteins in the membrane D) aquaporins E) a difference in water potential
The surface receptors on B and T cells both
A. play the same role in each type of cell. B. bind to free antigen. C. have two binding sites for antigen. D. have variable and constant regions. E. play the same role in each type of cell AND have two binding sites for antigen.
In a fifty-two card deck, the chances of drawing the only ace of spades are
A. 1/4. B. 1/52. C. 1/13. D. 1/26.
Which phrase describes the events that occur in the production of a pollen grain from a microspore mother cell?
a. Only meiosis occurs. b. First mitosis occurs, and then meiosis, followed by mitosis. c. First meiosis occurs, and then mitosis. d. First mitosis occurs, and then meiosis.