Which of the following is not correct with respect to a part of the flower and its function ?

Options

A. Sepals are green leaf - like structures which protect the flower after opening.
B. Petals are usually brightly coloured to attracts insects for pollination .
C. Staminodes produce pollen grains.
D. Stigma is the tip of carpel and is the receptive surface for pollen grains.

Answer

To solve the question "Which of the following is not correct with respect to a part of the flower and its function?", we will analyze each option provided in the question.

### Step-by-Step Solution:

1. **Understanding Flower Structure**:
- A flower typically consists of four main parts: sepals, petals, stamens, and pistils. Each part has a specific function.

2. **Evaluating Each Option**:
- **Option 1**: "Sepals are green leaf-like structures which protect the flower after opening."
- **Analysis**: This statement is correct. Sepals do protect the flower, especially before it opens.

- **Option 2**: "Petals are usually bright colored to attract insects for pollination."
- **Analysis**: This statement is also correct. The bright colors of petals serve to attract pollinators like insects.

- **Option 3**: "Staminode produce pollen grains."
- **Analysis**: This statement is incorrect. Staminodes are sterile stamens that do not produce pollen grains. They are non-fertile parts of the flower.

- **Option 4**: "Stigma is the tip of the carpel and is receptive for pollen grains."
- **Analysis**: This statement is correct. The stigma is indeed the part of the pistil that receives pollen.

3. **Identifying the Incorrect Statement**:
- From the analysis, we find that Option 3 is the only incorrect statement regarding the parts of the flower and their functions.

### Conclusion:
The answer to the question is **Option 3: "Staminode produce pollen grains."**

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