The germ pores on the pollen grains are found on the

Options

A. Exine only
B. Intine only
C. Both exine and intine
D. Vegetative cell

Answer

To determine where the germ pores on pollen grains are found, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding Pollen Grains**:
- Pollen grains are the male gametophytes in plants. They play a crucial role in reproduction by carrying male gametes to the female ovule.

2. **Structure of Pollen Grains**:
- Pollen grains have two main protective layers: the outer layer called the **exine** and the inner layer called the **intine**.
- The exine is known to be tough and hard, providing protection to the pollen grain.

3. **Composition of Exine**:
- The exine is primarily composed of a substance called **sporopollenin**, which is highly resistant to environmental degradation. This makes the pollen grains durable.

4. **Germ Pores**:
- Germ pores are specific areas on the pollen grain where the sporopollenin is absent. These pores allow for the emergence of the pollen tube during the process of pollination.
- The pollen tube is essential for delivering the male gametes to the ovule.

5. **Location of Germ Pores**:
- Since germ pores are located where sporopollenin is absent, they are found on the **exine** of the pollen grain.

6. **Conclusion**:
- Therefore, the germ pores on the pollen grains are found on the **exine**.

### Final Answer:
The germ pores on the pollen grains are found on the **exine**.

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