Assertion: A flower is modified shoot.
Reason: All the floral parts are borne on the receptacle(or thalamus).

Options

A. If both Assertion and Reason are true and the Reason is the correct explanation of the Assertion.
B. If both Assertion and Reason are true and the Reason is not
the correct explanation of the Assertion.
C. If Assertion is true but the Reason is false.
D. If both Assertion and Reason are false.

Answer

**Step-by-Step Solution:**

1. **Understanding the Assertion**: The assertion states that "A flower is a modified shoot." This means that the structure of a flower is derived from a stem but has adapted to serve a specific function – sexual reproduction in flowering plants (angiosperms).

2. **Understanding the Reason**: The reason provided is "All the floral parts are borne on the receptacle (or thalamus)." The receptacle is the thickened part of the stem from which the flower parts arise. This supports the idea that the flower is a modified shoot because, like a stem, it has a structure that supports various appendages.

3. **Similarities Between Flowers and Shoots**:
- Flowers arise in the axil of a leaf-like structure called a bract, similar to how branches arise from a stem.
- The receptacle of the flower supports all floral parts (calyx, corolla, androecium, and gynoecium), akin to how a stem supports leaves and branches.
- Floral appendages are arranged in whorls, which is a characteristic of stems where leaves are attached at nodes.

4. **Conclusion**: Since both the assertion and the reason are true, and the reason explains why the assertion is true, we conclude that both statements are correct. Therefore, the correct answer is that both the assertion and reason are true, and the reason is the correct explanation of the assertion.

**Final Answer**: Both the assertion and reason are true, and the reason is the correct explanation of the assertion.

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