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The microscopic pollen grains of the pla...

The microscopic pollen grains of the plast are obtained as fossils. Mention the characteristic of the pollen grains that makes it happen.

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The outer exine layer of pollen grains is coated with wax and sporopollenin which is hard and not easily degraded by micro-organisms. This property of exine makes pollen grains to remain entact in fossilized forms.
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