Question:
A pollen grain is provided resistance from physical and biological decomposition by its ___________.
A pollen grain is provided resistance from physical and biological decomposition by its ___________.
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{Sporopollenin = strongest biological polymer}
Updated On: Feb 4, 2026
- intine made up of cellulose and pectin
- exine composed of sporopollenin
- exine composed of cellulose and pectin
- intine made up of sporopollenin
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The Correct Option is B
Solution and Explanation
Step 1: Structure of pollen grain.
The pollen grain has two walls — outer exine and inner intine.
Step 2: Nature of exine.
Exine is composed of sporopollenin, one of the most resistant organic materials known.
Step 3: Protective function.
Due to sporopollenin, pollen grains can resist physical damage, chemicals, and biological degradation.
The pollen grain has two walls — outer exine and inner intine.
Step 2: Nature of exine.
Exine is composed of sporopollenin, one of the most resistant organic materials known.
Step 3: Protective function.
Due to sporopollenin, pollen grains can resist physical damage, chemicals, and biological degradation.
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