Tuesday 19 April 2016

evolution - Why did the process of sleep evolve in many animals? What is its evolutionary advantage?


The process of sleep seems to be very disadvantageous to an organism as it is extremely vulnerable to predation for several hours at a time. Why is sleep necessary in so many animals? What advantage did it give the individuals that evolved to have it as an adaptation? When and how did it likely occur in the evolutionary path of animals?




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