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OleMash [197]
3 years ago
12

Explain two ways in Which immunity is produced

Biology
1 answer:
lapo4ka [179]3 years ago
5 0
1. mother to fetus 2. through exposure to the antigen (virus, toxins, or cancer cells).
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<u>In law of superposition which layer is the oldest and which layer is the youngest?</u>


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