Pollen grains of a beautiful rose plant were used after a month of their release to pollinate a flower of the same species. Which one of the following events do you think will occur?

The pollen will be rejected as it is no longer viable

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The pollen grains will germinate.

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Pollen grains will germinate once an insect visits the flower.

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None of these

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Solution

The correct option is B The pollen grains will germinate.
The viability of pollen grains in some members of Rosaceae, Leguminoseae and Solanaceae is maintained for months. Since rose is a member of the Rosaceae family, its pollen grains will germinate even after a month of their release.
Insects are needed for pollination but not for the germination of pollen grains.

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Pollen Viability

Standard XII Biology

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