Read the following statements related to pollen grains of flowering plants and select the incorrect aspect regarding them ?

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25- 50 micro meter in diameter

Exine wall is with a tough lipid sporopollenin except at germ pores

Inner intine wall is made of pectin and cellulose.

Assymetric spindle formation during mitosis in pollen grain results in the formation of large generative cell and small vegetative cell

answer is D.

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Detailed Solution

When the pollen grain is mature it contains two cells, the vegetative cell and the generative cell. Asymmetric spindle during mitosis of microspore results in formation of a , bigger vegetative cell and a smaller generative cell. The vegetative cell has abundant food reserve and a large irregularly shaped nucleus. While the generative cell is small and floats in the cytoplasm of the vegetative cell. It is spindle shaped with dense cytoplasm and a nucleus.

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