Multiple choice

Which of the following is an egg laying mammal?

  1. Platypus

  2. Bat

  3. Rat

  4. Kangaroo
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A Correct answer
Explanation

Monotremes like the platypus are the only egg-laying mammals, representing an ancient evolutionary lineage. Unlike most mammals that give birth to live young, platypuses lay eggs and then nurse their young with milk. Other options (bat, rat, kangaroo) are all placental or marsupial mammals that give live birth.

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