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Transition of radial vascular bundle in root to conjoint vascular bundle in stem occurs in which zone?

1. Epicotyl
2. Hypocotyl
3. Meristem
4. At base of stem

Correct answer: Hypocotyl

Solution

The hypocotyl is the transitional zone between root and stem, so it is where the vascular bundles shift from radial arrangement in the root to conjoint arrangement in the stem. This makes it the correct site for the change.

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