Which white blood cell(s) is (are) the only
cell(s) that produces antibodies?
a. B cell
b. T cell
c. natural killer cell
d. dendritic cell
e. all of these
A
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During DNA replication, nascent DNA strands are synthesized in only one direction. Nucleotides are added only to which end of the nascent strand?
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Discuss the concept of inclusive fitness. What will be an ideal response?
A saclike cell in which spores form by meiosis is known as
A. ascus. B. mycelium. C. hypha. D. basidiocarp. E. mycorrhiza.
Too much calcium in the bloodstream, a condition called hypercalcemia, can be very dangerous. The thyroid gland releases a hormone, calcitonin, when calcium is too high. How does calcitonin lower calcium levels in the blood?
A) It increases both osteoclast and osteoblast activity. B) It reduces both osteoclast and osteoblast activity. C) It reduces osteoclast activity and increases osteoblast activity. D) It increases osteoclast activity and reduces osteoblast activity.