Question

mention the wall layers and chemical composition of pollen grain​

Answer 1

Explanation:

While the exine is composed of sporopollenin, a complex and highly resistant biopolymer containing fatty acids, phenylpropanoids, phenolics and carotenoids, the intine is largely composed of pectin and cellulose. The origin and genetic control of the synthesis of the two pollen wall layers is different..

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Answer 2

Answer:

Explanation:

While the exine is composed of sporopollenin, a complex and highly resistant biopolymer containing fatty acids, phenylpropanoids, phenolics and carotenoids, the intine is largely composed of pectin and cellulose. The origin and genetic control of the synthesis of the two pollen wall layers is different.