Question

Germ pores of pollen grains are useful for

• A. Helps in the formation of the pollen tube and the release of the male gametes during fertilisation
• B. Germination of the seed
• C. Growth of the pollen tube
• D. Helps in the formation of female gametes

Hint:

The germ pores are essential for the germination of pollen and the formation of the pollen tube that carries the male gametes to the ovule.

Answer 1

The Correct Option is A

The correct answer is: Germ pores of pollen grains are useful for helping in the formation of the pollen tube and the release of male gametes during fertilization.

Explanation of germ pores:

• Germ pores: These are specialized openings in the outer layer (the exine) of the pollen grain. They are typically present at specific locations on the pollen grain and are important for the development of the pollen tube.
• Pollen tube formation: When a pollen grain lands on the stigma of a flower, the germ pores provide a point of entry for the growth of the pollen tube. The tube grows through the style toward the ovary, carrying the male gametes (sperm cells) with it.
• Release of male gametes: As the pollen tube reaches the ovule, the male gametes (sperm cells) are released from the tube into the ovule, where fertilization occurs, resulting in the formation of a zygote.

Importance of germ pores in fertilization:

• The germ pores allow the pollen tube to emerge from the pollen grain and grow toward the ovule, ensuring that the male gametes can be transported to the female gametes for fertilization.
• Without the presence of germ pores, the pollen grain would not be able to successfully form a pollen tube, hindering the fertilization process.

Thus, germ pores play a crucial role in the reproductive process of plants by facilitating the formation of the pollen tube and ensuring the release of male gametes, which is essential for fertilization and the development of seeds.