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).
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The function of the epiglottis is ____ while swallowing
a. to move the tongue out of the way b. to cover the esophagus c. to cover the glottis d. to cover both the esophagus and the glottis e. to secrete mucus
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).
Primary growth (lengthening) arises from __________. Fill in the blank(s) with the appropriate word(s)
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.