Respuesta :
The hypothesis that sleep in higher animals, with its division into REM and NREM sleep, has evolved along with warm-bloodedness is supported by the striking similarities between sleep in birds and sleep in mammals.
Exactly how do birds sleep?
Both REM and NREM sleep are common in birds, and both show EEG patterns that are similar to those of mammals. Different birds have varying sleep patterns, but unlike mammals, birds do not exhibit the relationships between sleep and body mass, brain mass, relative brain mass, basal metabolism, and other parameters. Birds who sleep in surroundings where they are comfortable are the only ones who can clearly explain why different species of birds require varied amounts of sleep. Compared to birds sleeping in more safe habitats, those who are exposed to predators had less deep sleep.
enumerate how mammals sleep?
Mammals exhibit a wide range of sleeping behaviors. They often have periods of alternating REM and non-REM sleep, but these take varied forms. Horses and other herbivorous ungulates can sleep while standing, but they must lie down for short periods of REM sleep (which results in muscular atony). For example, giraffes just require a brief period of lying down to enter REM sleep. Bats hang upside down when they sleep.
To know more about REM sleep:
https://brainly.com/question/13026002
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