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………………is formed of a chemical called spo...

………………is formed of a chemical called sporopollenin.

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Purest form of iron is called as

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Exine is formed of substance called ……..

Bakelite is formed by the chemical combination of phenol and ______.

Assertion : Exine of a pollen grain is made up of sporopollenin which is resistant to high temperature, strong acid or alkali as well as enzymatic degradation. Reason : Sporopollenin is absent in the region of germ pores.

Sporopollenin is chemically :

ARIHANT PUBLICATION-SEXUAL REPRODUCTION IN FLOWERING PLANTS-CHAPTER PRACTICE (LONG ANSWER TYPE II QUESTIONS)
  1. ………………is formed of a chemical called sporopollenin.

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  2. Briefly discuss the formation of male gametophyte.

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