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Onion is modified form of
1. Leaf
2. Stem
3. Root
4. None of these

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Correct Answer - Option 2 : Stem

The correct answer is Stem.

  • Onion has a modified form of stem called a bulb, or more specifically a tunic-ate bulb.
    • In this type of modified stems, the stem is enclosed by a covering of leaves and it is underground.
    • Nutrients for the plant are stored within the bulb.

  • An onion is neither a root nor a stem.
    • It is a tunicate bulb having a cluster of fleshy leaves.
    • An onion is a modified underground stem structure.
    • The onion plant stores its processed food in the bulged leaf structure at the base.
    • The onion plant has a fan of hollow, bluish-green leaves and its bulb at the base of the plant begins to swell when a certain day-length is reached.
    • The bulbs are composed of shortened, compressed, underground stems surrounded by fleshy modified scale (leaves) that envelop a central bud at the tip of the stem.

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