Question

What is the function of the germ pore?

• A. Emergence of radicle
• B. Absorption of water for seed germination
• C. Initiation of pollen tube
• D. Release of male gametes

Answer 1

Answer: (C), (D)

Release of male gametes

The correct options are C and D.

Explanation of correct options:

Option C:

1. The pollen grain or the male gametophyte is surrounded by a thick outer layer called exine which is made up of a substance called sporopollenin.
2. In some places, the exine is very thin and lacks sporopollenin; it is known as the germ pore.
3. The elongation of the pollen tube takes place from the germ pore when the pollen grain lands on the stigma.

Option D:

1. When the pollen grain lands on the female stigma of a flower, the germ pore initiates the formation of a pollen tube that passes down the style up to the ovary.
2. The male gametes travel in the pollen tube and are released to fertilize the female gametes in the ovule.

Explanation of incorrect options:

Option A:

The radicle, also known as the primary root emerges from the seed to increase the absorption of water and minerals to promote the growth of the embryo.

Option B:

Absorption of water for seed germination, also called imbibition occurs through a small opening in the seed called the micropyle or through the seed coat.

Final Answer: The function of the germ pore is the initiation of the pollen tube and the release of male gametes.