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Which is an example of an internal stimulus?

A) a sudden change of air temperature
B) an artificial light that attracts insects
C) an increase in the amount of water available to a plant
D) a decrease in oxygen levels in the blood during exercise


Respuesta :

The answer to your question is D, a decrease in oxygen levels in the blood during exercise.



Hope this helps!

potatoawesomenut

Answer:

A decrease in oxygen levels in the blood during exercise

Explanation:

That is the correct answer, I promise I got it correct.

I took the K12 test.

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