Adaptive Modifications in Plants · NCERT Biology

Bulbs such as onion are modified stems characterized by:

  1. Modified leaves with a stipular origin
  2. Modified roots growing from the node base
  3. Modified stems that bear axillary buds
  4. Modified floral parts with reproductive tissue
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Correct answer: Modified stems that bear axillary buds

Thorns in Bougainvillea are modified stems that bear axillary buds. They provide protection against herbivores and may reduce water loss.

Difficulty: Medium Question 11 of 20

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