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12 June, 22:17

Which is an external stimulus?

A. Thirst

B. Hunger

C. Pain

D. Heat

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Answers (2)
  1. 12 June, 22:56
    0
    D. Heat, heat is an external stimulus. An external stimulus is a signal that originates from outside an organism.
  2. 13 June, 01:14
    0
    C. Pain is the answer.
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