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  4. The viability of pollen grains is highly variable. The least pollen viability will be observed in:

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Q. The viability of pollen grains is highly variable. The least pollen viability will be observed in:

NTA AbhyasNTA Abhyas 2020Sexual Reproduction in Flowering Plants

Solution:

The period for which pollen grains remain viable is highly variable and to some extent depends on the prevailing temperature and humidity. In some cereals such as rice and wheat, pollen grains lose viability within 30 minutes of their release, and in some members of Rosaceae, Leguminoseae and Solanaceae, they maintain viability for months.