Question

Function of guiding and attracting pollen tube is done by.

• A. Egg cell
• B. Filiform apparatus
• C. Antipodal cells
• D. Secondary nucleus

Answer 1

The correct option is B Filiform apparatus

• Egg cell is the female gamete present in the embryo sac, towards the micropylar pole. One male gamete fuses with the egg cell and a diploid zygote is formed. This is called syngamy.

• Filiform apparatus is present in the synergids towards the micropylar pole. It is the finger like projections formed due to invaginations of the cell wall into the protoplasm. It guides the pollen tube entry in the ovule by secreting some chemotactic substances.

• Antipodal cells are generally three in number and present towards the chalazal pole. They are involved in the transfer of nutrients and growth hormones to the developing embryo sac.

• Secondary nucleus is formed by the fusion of two polar nuclei and is present in the central cell present in the centre of the embryo sac. The second male gamete fuses with the secondary nucleus to form triploid endosperm. This is known as triple fusion.

Hence, the function of guiding and attracting pollen tube is done by Filiform apparatus. So, the correct answer is B.