Fertilisation, Development and Birth in Animals · NCERT Biology

Which statement best describes fertilisation and development in animals?

  1. All animals rely on external fertilisation regardless of habitat
  2. Embryonic development always occurs outside the mother's body
  3. Fertilisation and development strategies vary across animal groups
  4. Viviparity is found exclusively in aquatic animal species
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Correct answer: Fertilisation and development strategies vary across animal groups

Animals show diverse modes of fertilisation and development. These adaptations are influenced by habitat and lifestyle.

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