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NEETZoologyEvolution

What happened to South American mammals when South America joined North America?

Options

  1. AThey evolved into new species
  2. BThey were replaced by North American fauna
  3. CThey became extinct
  4. DThey migrated to Europe

Correct answer

B. They were replaced by North American fauna

Step-by-step solution

The first mammals were like shrews. Their fossils are small sized. Mammals were viviparous and protected their unborn young inside the mother’s body. Mammals were more intelligent in sensing and avoiding danger at least. When reptiles came down mammals took over this earth. There were in South America mammals resembling horse, hippopotamus, bear, rabbit, etc. Due to continental drift, when South America joined North America, these animals were overridden by North American fauna. Due to the same continental drift po

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