Multiple choice general knowledge science & technology

who sleeps with one eye open?

  1. Dolphine

  2. whale

  3. Jelly Fish

  4. Octopus
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Dolphins sleep with one eye open because they exhibit unihemispheric slow-wave sleep - they rest one brain hemisphere at a time while keeping the other awake to breathe and maintain awareness.

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