Question:

Role of pollen-pistil interaction in hybrid formation.

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This is a dynamic process of chemical "dialogue".
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Solution and Explanation

Step 1: Understanding the Concept:
Pistil acts as a biological filter.

Step 2: Detailed Explanation:
The pistil recognizes right (compatible) vs wrong (incompatible) pollen through chemical signals. Only right pollen germinates.

Step 3: Final Answer:
Ensuring fertilization by compatible gametes.
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