What will happen if pollen grains of rose land on the stigma of hibiscus?

Pollen tube grows

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Fertilization

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Flower changes colour

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No growth of pollen tube

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Solution

The correct option is D No growth of pollen tube
Growth of pollen tube will only happen if pollen grains of same plant type (called a species) land on the stigma of the same species. If it lands on the stigma of other species, then the pollen grains disintegrate.

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