The structure of flower which forms pericarp in true fruit is

Options

A. Thalamus
B. Outer integument of ovule
C. Stalk
D. Wall of ovary

Answer

To answer the question about which structure of the flower forms the pericarp in a true fruit, we can break down the solution into the following steps:

### Step-by-Step Solution:

1. **Understanding True Fruits**:
- True fruits develop exclusively from the ovary of the flower after fertilization. The ovary wall becomes the fruit, while the ovules develop into seeds.

2. **Identifying the Options**:
- The question provides four options: thalamus, outer integument of the ovule, stalk, and wall of the ovary.

3. **Analyzing Each Option**:
- **Thalamus**: This is part of the flower structure but is not involved in forming the pericarp of true fruits. It is involved in some false fruits like apples.
- **Outer Integument of the Ovule**: This develops into the seed, not the fruit, so it cannot be the correct answer.
- **Stalk**: The stalk (peduncle) supports the flower but does not contribute to the fruit structure, making this option incorrect.
- **Wall of the Ovary**: This is the correct answer. The wall of the ovary develops into the pericarp, which is the fleshy part of the fruit surrounding the seeds.

4. **Conclusion**:
- The structure of the flower that forms the pericarp in a true fruit is the **wall of the ovary**.

### Final Answer:
The structure of the flower which forms pericarp in true fruit is the **wall of the ovary**.

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