To activate T-cells, the antigen must be shown to these cells by other cells called 

A. neutrophils.
B. basophils.
C. antigen-presenting cell (APCs).
D. B-cells.


C. antigen-presenting cell (APCs).

Biology & Microbiology

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The function of the epiglottis is ____ while swallowing

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Monocots and eudicots differ in how xylem and phloem are distributed in ground tissue, in the number

of petals in flowers, and in the number of __________. Fill in the blank(s) with the appropriate word(s).

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Primary growth (lengthening) arises from __________. Fill in the blank(s) with the appropriate word(s)

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Acrosomes contain nutrients for the developing sperm cells, and they also secrete hormones and other signaling

molecules. Indicate whether the statement is true or false.

Biology & Microbiology