In Figure 47-1, dentin is labeled as number:



a. 1

b. 2

c. 3

d. 4

e. 5


b

Biology & Microbiology

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Affinity maturation is one of the factors responsible for a stronger secondary immune response

Indicate whether the statement is true or false.

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The "master cells" of the immune system that initiate and coordinate the adaptive immune response are

A. basophils. B. helper T cells. C. mast cells. D. cytotoxic T cells. E. B cells.

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Restriction endonucleases were discovered by ________.

A. Arber and Smith B. Jackson, Symons, and Berg C. Temin and Baltimore D. Boyer and Cohen

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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.

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