Why do bears enter a deep sleep?
Thyroid-stimulating hormone prolactin release chemical messengers They can't live in the cold To get some rest To conserve energy Endocrine system They don't like the winter
A B C D E F G H
When they hibernate, bears enter a deep sleep.
Bears enter a deep sleep to conserve energy
Why do bears enter a deep sleep? (A) Thyroid-stimulating hormone (B) prolactin release (C) chemical messengers (D) They can't live in the cold (E) To get some rest (F) To conserve energy (G) Endocrine system (H) They don't like the winter