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Type: Multiple-Choice
Category: Circulatory and Immune Systems
Level: Grade 9
Score: 1
Author: rhoneli
Last Modified: 8 months ago

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Circulatory and Immune Systems Question

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Grade 9 Circulatory and Immune Systems

A chemical that kills bacteria or slows their growth without harming body cells is a(n)                .
  1. allergen
  2. antibiotic
  3. histamine
  4. pathogen
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