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Nezavi [6.7K]
4 years ago
11

What type of stimulus is an allergen such as pollen?

Biology
2 answers:
Marat540 [252]4 years ago
6 0
Response to a stimulus
sammy [17]4 years ago
4 0

The correct answer is B. external stimulus

I did the test too XD Hope you do well!! ^w^

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