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प्रश्न
The microscopic pollen grains of the past are obtained as fossils. Mention the characteristic of the pollen grains that makes it happen. Name the cells present in a pollen grain.
लघु उत्तर
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उत्तर
The resistant sporopollenin in the pollen-wall exine allows pollen grains to persist and be preserved as fossils. A mature pollen grain contains a vegetative cell and a generative cell; in some species it is shed after the generative cell has divided into two male gametes.
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