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The __________ acts as the internal clock that controls sleep and waking cycles. A. Hypothalamus B. Pineal gland C. Ovaries D. Thyroid Please select the best answer from the choices provided A B C D.

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amethystgdominguez13

Answer:

i think the answer is A. Hypothalamus

Explanation:

hope im not to late

Answer:

B. The Pineal Gland is the right answer.

Explanation:

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