JIPMER2019BotanySexual Reproduction in Flowering Plants

Hardest substance in plant kingdom is

Options

Asaple
Bcorolla
Csporopollenin
Danther

Correct answer

C. sporopollenin

Step-by-step solution

Sporopollenin is the hardest substance in plant kingdom. It is the major constituent of outer layer (exine) of pollen grains. It is the most resistant organic material that can withstand high temperature as well as strong acids and alkali. No enzyme is known which can degrade it.

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