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Q: Which of the following mammals lay eggs?
  • A. Bat
  • B. Whale
  • C. Weasel
  • D. Platypus
Correct Answer: Option D - The platypus, sometimes referred to as the duck billed platypus is a semiaquatic, egg-laying mammal endemic to eastern Australia, including Tasmania. The platypus is the sole living representative of its family and genus, though a number of related species appear in the fossil record. Together with the four species of Echidna, it is one of the five extant species of monotremes, the only mammals that lay eggs instead of giving birth to live young.
D. The platypus, sometimes referred to as the duck billed platypus is a semiaquatic, egg-laying mammal endemic to eastern Australia, including Tasmania. The platypus is the sole living representative of its family and genus, though a number of related species appear in the fossil record. Together with the four species of Echidna, it is one of the five extant species of monotremes, the only mammals that lay eggs instead of giving birth to live young.

Explanations:

The platypus, sometimes referred to as the duck billed platypus is a semiaquatic, egg-laying mammal endemic to eastern Australia, including Tasmania. The platypus is the sole living representative of its family and genus, though a number of related species appear in the fossil record. Together with the four species of Echidna, it is one of the five extant species of monotremes, the only mammals that lay eggs instead of giving birth to live young.