Which kind of T cell is most important in the removal of virally-infected cells from the body?
A. helper T cells
B. memory T cells
C. cytotoxic T cells
D. suppressor T cells
Answer: C
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Tropical deciduous forests experience ____
a. mean annual temperature of at least 25oC b. summer drought c. winter drought
d. frequent mists e. slow growth
Describe the relationship between telomeres and aging
What will be an ideal response?
A host race develops when an organism's
a. genes for the host plant choice change. b. genes for mating preferences change. c. geographical barriers exist. d. genes for the host plant choice change and genes for mating preferences change. e. genes for mating preferences change and geographical barriers exist.
Cytotoxic T-cells
A. lack specificity for a target cell. B. secrete interleukin-2 to stimulate B and T-cells. C. stimulate B-cell proliferation. D. secrete granzymes and perforins that damage target cells. E. All of these choices are correct.