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ki77a [65]
2 years ago
10

What best describes the role of cell-to-cell communication during a response to an invasion of antigens?

Biology
1 answer:
Svetllana [295]2 years ago
8 0

Answer:

Chemicals that are secreted from antigen-presenting cells then activate helper T cells.

Explanation:

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Answer:

A.

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Other species that rely on those fish would die off. The extinction of one species can lead to the extinction of another and so on.

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