The tuberculin response is mediated by
A) memory T cells.
B) mast cells.
C) B lymphocytes.
D) plasma cells.
E) eosinophils.
A
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Rubisco __________
A. controls photosynthesis B. is a primary control over the global carbon cycle C. carboxylates CO2 D. reduces RuBP E. is only present in leaves
DNA contains an organism's genetic material, organized into sequences called:
a. genes. b. chromosomes. c. gametes. d. nuclei. e. sperm and egg cells.
Which of the following misconceptions about evolution can be refuted with the molecular evidence that is being collected through DNA analysis?
A. Evolution is not observable or testable, thus it is not science. B. Evolution proposes life changed as a result of random events; traits are too complex to have originated by chance alone. C. Evolution is a theory about how life originated. D. There are no transitional fossils.
A human red blood cell in an artery of the left arm is on its way to deliver oxygen to a cell in the thumb. To travel from the artery to the thumb and then back to the left ventricle, this red blood cell must pass through _____
A) one capillary bed B) two capillary beds C) three capillary beds D) four capillary beds