The evolutionary explanations of sleep

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1. AO1: Herbivores eat food with low nutrient content so have to eat more. Carnivores eat food with a high nutrient content so don't have to eat as often. This effects how long they can sleep for. This refers to which evolutionary explanation?

  • Energy Conservation
  • Foraging Requirements
  • Waste of Time
  • Predator Avoidance
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2. AO2: An alternative approach by Horne (1998) combines the evolutionary and restorative explanations. It suggests:

  • There is a core and optional sleep: the core sleep is mainly SWS and is vital for processes to work and optional sleep is mainly REM and is dispensable.
  • There is a core and optional sleep: the core sleep is mainly REM and is vital for processes to work and optional sleep is mainly SWS and is dispensable.

3. AO1: Predators can sleep more whilst prey have to sleep less. This refers to which evolutionary explanation?

  • Predator Avoidance
  • Energy Conservation
  • Waste of time
  • Foraging Requirements

4. AO1: Sleep ensures animals stay still when they have nothing else to do. Sleeping more is the best way to pass on genes due to it being safer to be asleep.This refers to which evolutionary explanation?

  • Predator Avoidance
  • Energy Conservation
  • Waste of Time
  • Foraging Requirements

5. AO2: Capellini (2008) looked at previous studies with standardised procedures and found that animals who sleep in exposed positions sleep less. This supports which explanation?

  • predator avoidance
  • energy conservation
  • waste of time
  • foraging requirements

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