NEET2013BotanySexual Reproduction in Flowering PlantsActual
Which of the following statements is correct?
Options
- ASporopollenin can be degraded by enzymes.
- BSporopollenin is made up of inorganic materials.
- CSporopollenin can withstand high temperatures as well as strong acids and alkalis.
- DSporopollenin can withstand high temperatures but not strong acids.
Correct answer
C. Sporopollenin can withstand high temperatures as well as strong acids and alkalis.
Step-by-step 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.