Multiple choice

Which of the following is the most resistant known biological material?

  1. Lignin

  2. Hemicellulose

  3. Sporopollenin

  4. Lignocellulose
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C Correct answer
Explanation

Sporopollenin is one of the most chemically inert biological polymers. It is a major component of the tough outer (exine) walls of plant spores and pollen grains. It is chemically very stable and is usually well preserved in soils and sediments.

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