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Stomach acid is which kind of barrier to most pathogens that enter the digestive system? physical chemical
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Stomach acid is which kind of barrier to most pathogens that enter the digestive system?

physical

chemical

User JSBob
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2 Answers

6 votes
The correct answer is physical
User Bijan
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4.4k points
6 votes
The correct answer is chemical.
User Kellen Stuart
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4.4k points
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