Question

One of the signs that sleep is necessary is that all living creatures __________.

Answer 1

One of the signs that sleep is necessary is that all living creatures __________. a. are harmed by lack of sleep

Answer 2

One of the signs that sleep is necessary is that all living creatures are harmed by lack of sleep. Correct answer: A Sleep serves important evolutionary functions for all animals, because sleep helps animals consolidate memories and learn. Animals sleep according to how much they eat – animals that eat food with a lower caloric density sleep less than others. However, lack of sleep and if the deprivation is long enough it can kill animals.