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3 votes
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


2 Answers

1 vote
D) a decrease in oxygen levels in the blood during exercise
User Eagor
by
8.3k points
3 votes

Answer is Option D:

A decrease in oxygen levels in the blood during exercise

User Kevin E
by
7.7k points
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