Q19 / 180 · AIIMS 2003 · Botany

Pollen grains are able to withstand extremes of temperature and dessication because their exine is composed of

  • A
    cutin
  • B
    suberin
  • Correct answer
    C
    sporopollenin
  • D
    callose.

Solution

Exine is outer layer of pollen grain which is acetolysis resistant layer. It is also resistant to physical and biological degradation. Because of this property of exine, pollen grains are found well preserved for long periods in fossil deposits.

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

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