FAS

What is the relationship between exposure to a virus and developing an immunity to it?

Exposure to a virus-infected cell can cause the antigen-specific T lymphocytes to differentiate into cytotoxic effector T cells, which can lyse virus infected or virally transformed cells.

development of an immunity will not cause harm to you

Explanation:

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8 m/s because for him to get the same amount of energy as ray is putting out, bobby, who weighs half as much as ray, needs to run twice as fast.

hey there!

mass = 6.75 g

volume =   9 cm³

therefore:

d = mass / volume

d   = 6.75 / 9

d = 0.7 g/cm³

answer b