Multiple choice

Prototherians have evolved from

  1. reptiles

  2. birds

  3. eutherians

  4. amphibians
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A Correct answer
Explanation

Prototherians (monotremes like platypus and echidna) are the most ancestral mammals, showing characteristics suggesting evolution from reptilian ancestors. They lay eggs, have cloacas, and share skeletal features with reptiles, supporting the evolutionary link.

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