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What is a stimulus is an allergen such as pollen?

A.Internal Stimulus

B.Inborn Stimulus

C.External Stimulus

D.Response To a Stimulus

User FloppyDisk
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2 Answers

3 votes
Hello there.

What is a stimulus is an allergen such as pollen? It is response to a stimulus.
User Sergey Berezovskiy
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It would be C, external stimulus.
User Runar Halse
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