Pollen grains are wellpresereved as fossils
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Pollen grains are well-preserved as fossils because of the presence of sporopollenin. Pollen grains has a prominent two-layered wall. The hard outer layer called the exine is made up of sporopollenin which is one of the most resistant organic material known.
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Pollen grains are well preserved as fossils due to the presence of sporopollenin on their surface which defends it from all kinds of natural adversities.
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