Question

Which of the following statements about pollen grains is incorrect?

• A. Pollen grains develop from megaspores.
• B. Pollen grains contain two cells: a generative cell and a tube cell.
• C. Pollen grains are released from the stigma during pollination.
• D. Pollen grains play a crucial role in the reproductive process of seed plants.

Hint:

Pollen grains develop from microspores, which are part of the male reproductive structure in flowering plants. Megaspores, in contrast, are part of the female reproductive system.

Answer 1

The Correct Option is A

Step 1: Understanding pollen grain development.
Pollen grains develop from microspores, not megaspores. Microspores are formed through the process of microsporogenesis in the anthers of flowering plants. Step 2: Analysis of other statements.
Option (B): Pollen grains do contain two cells: a generative cell and a tube cell. The generative cell later divides to form two sperm cells. Option (C): Pollen grains are released from the anthers, not the stigma, during pollination. Option (D): Pollen grains play a critical role in the reproductive process by carrying male gametes for fertilization. Step 3: Identifying the incorrect statement.
The statement that pollen grains develop from megaspores is incorrect. Megaspores give rise to the female gametophyte. \[ \therefore \text{The correct answer is: Pollen grains develop from megaspores.} \]