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An organic substance that can withstand environmental extremes and cannot be degraded by any enzyme is:

1. Cuticle
2. Sporopollenin
3. Lignin
4. Cellulose

Correct answer: Sporopollenin

Solution

Sporopollenin is an exceptionally inert biopolymer that forms the outer wall of pollen and spores, making it highly resistant to environmental extremes and enzymatic degradation. The other options are structural plant substances, but none are as chemically resistant as sporopollenin.

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