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In vitro clonal propagation in plants is characterized by:

1. PCR and RAPD
2. Northern blotting
3. Electrophoresis and HPLC
4. Microscopy

Correct answer: Microscopy

Solution

In vitro clonal propagation involves growing plant tissues under controlled conditions and monitoring their development. Microscopy is the appropriate method because it allows direct observation of cells, explants, and regenerated plantlets during culture.

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