The problem with tissue rejection following organ transplants
A. is due to the tissues being recognized as nonself, and therefore being treated as a foreign substance.
B. can be reduced by administering immunosuppressive drugs.
C. can be reduced if the organ donor is a close relative with very similar tissue proteins.
D. All of the choices are correct.
E. None of these are correct.
Answer: D
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Explain how bone remodeling can have both positive and negative consequences for an individual
What will be an ideal response?
X inactivation occurs
a. at birth. b. at the beginning of the second trimester. c. after the first cleavages of the zygote. d. at the moment of conception. e. randomly depending on the individual.
By the ______________ theory, water is pulled upward through a plant by air's drying power, which creates continuous negative pressure.
A. transpiration B. cohesion-tension C. pressure flow D. adaptive E. water-conservation
In dividing cells, most of the cell's growth occurs during _______.
Fill in the blank(s) with the appropriate word(s).