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  4. Pollen grains are well preserved as fossils because of the presence of:

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Q. Pollen grains are well preserved as fossils because of the presence of:

NTA AbhyasNTA Abhyas 2020Sexual Reproduction in Flowering Plants

Solution:

Pollen grains are surrounded by outer wall called as exine which is made up of sporopollenin. It is hardest most resistant biological material, which cannot be degraded by enzyme acid or base. Pollen grains are well preserved as fossil due to sporopollenin.