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 germ pores of pollen grains are crucial for the formation of the pollen tube and the subsequent release of male gametes during fertilization.

Germ Pore Details:

• Germ Pores: These are distinct openings in the exine, the outer layer of a pollen grain, strategically located to facilitate pollen tube development.
• Pollen Tube Formation: Upon landing on the stigma, the germ pores serve as entry points for the pollen tube's growth down the style towards the ovary, carrying the male gametes.
• Male Gamete Release: Upon reaching the ovule, the male gametes exit the pollen tube for fertilization, initiating zygote development.

Germ Pores' Significance in Fertilization:

• Germ pores enable the pollen tube's emergence and directed growth towards the ovule, ensuring male gamete delivery for fertilization.
• The absence of germ pores would prevent successful pollen tube formation, thereby impeding the fertilization process.

In summary, germ pores are vital to plant reproduction by facilitating pollen tube growth and the release of male gametes, which are indispensable for fertilization and seed development.