Q40 / 180 · NEET 2013 (Karnataka) · Botany

Which of the following statements is correct?

  • A
    Sporopollenin can be degraded by enzymes.
  • B
    Sporopollenin is made up of inorganic materials.
  • Correct answer
    C
    Sporopollenin can withstand high temperatures as well as strong acids and alkalis.
  • D
    Sporopollenin can withstand high temperatures but not strong acids.

Solution

Sporopollenin forms the outer covering of the exine \& it is the most resistant organic material on the Earth ever known. It is the most resistant biological material which helps in fossilization of pollen grains. It protects pollen grains from external factors such as temperature, acid, alkali, enzyme etc. Related Theory The tapetal cells secrete ubisch granules that provides sporopollenin and other materials for exine formation.

Hence, the correct answer is option: 'C'.

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