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STD 12 - 1. sexual reproduction in flowering plants — NEET STD 11 Science — Question

Gujarat BoardEnglish MediumSTD 11 ScienceNEETSTD 12 - 1. sexual reproduction in flowering plants4 Marks
MCQ
An organic substance that can withstand environmental extremes and cannot be degraded by any enzyme is
  • A
    cuticle
  • ✓
    sporopollenin
  • C
    lignin
  • D
    cellulose.
✓

Answer

Correct option: B.
sporopollenin
b
(b) : Sporopollenin is a major component of the tough outer (exine) walls of spores and pollen grains. It is chemically very stable and is usually well preserved in soils and sediments. It can withstand environmental extremes and cannot be degraded by enzymes and strong chemical reagents.

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