The first division in a pollen grain results in formation of

Options

A. a larger vegetative cell and smaller generative cell
B. a larger generative celll and smaller vegetative cell
C. 2 equal cells
D. 4 male gametes

Answer

**Step-by-Step Solution:**

1. **Understanding Pollen Grain Structure**: Pollen grains are the male gametophytes of seed plants. They contain cells that will eventually form male gametes.

2. **First Division in Pollen Grain**: The first division that occurs in a pollen grain is a mitotic division. This division is characterized by being unequal.

3. **Formation of Cells**: During this unequal mitotic division, two types of cells are formed:
- A **large vegetative cell** (also known as the tube cell).
- A **smaller generative cell**.

4. **Characteristics of the Cells**:
- The **vegetative cell** is larger and contains abundant cytoplasm and food reserves. It is responsible for forming the pollen tube during fertilization.
- The **generative cell** is smaller and has less cytoplasm and food reserves. It will eventually divide to form two male gametes.

5. **Conclusion**: Therefore, the first division in a pollen grain results in the formation of a large vegetative cell and a smaller generative cell.

**Final Answer**: A large vegetative cell and a smaller generative cell.

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