Herbivorous animals,such as cows or horses,sleep only a few hours each day.Carnivorous predators,such as cats,sleep many hours a day.How do these observations inform theories of functions of sleep?

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These observations support the adaptive theory of sleep, which suggests that animals sleep to conserve energy and avoid predators. Herbivorous animals, which have less need to constantly hunt or forage for food, can afford to sleep less while carnivorous predators need to sleep more to conserve energy and be alert for potential prey.

Herbivorous Animals,such as Cows or Horses,sleep Only a Few Hours