Multiple choice

What is the shape of the eggs of cliff-dwelling bird?

  1. Extra pointy at the end

  2. Round

  3. Square

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

Cliff-dwelling birds like murres, kittiwakes, and guillemots lay eggs that are distinctly pointed at one end. This pyriform (pear-shaped) adaptation prevents the eggs from rolling off narrow cliff ledges - they roll in tight circles instead. Round eggs would easily roll off the cliff edge.

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