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Question
Which specific substance in the exine makes pollen grains highly resistant to environmental stress and aids in their preservation as fossils?
Options
Cellulose
Pectin
Sporopollenin
Lignin
MCQ
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Solution
Sporopollenin
Explanation:
Sporopollenin is one of the most resistant organic materials known. It protects the pollen from enzymes, high temperatures, and strong acids/alkalis, allowing it to be fossilised.
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