Thalamus (torus/receptacle) is condensed end of floral axis on which floral leaves are inserted. This thalamus represents

Options

A. 4 internodes
B. 3 internodes
C. 2 internodes
D. 1 internodes

Answer

**Step-by-Step Solution:**

1. **Understanding Thalamus**: The thalamus, also known as the torus or receptacle, is the thickened part of the floral axis where the floral organs (like sepals, petals, stamens, and carpels) are attached. It serves as the base of the flower.

2. **Identifying Floral Organs**: The thalamus is crucial because it supports the attachment of various floral parts. The sepals are attached at the base of the thalamus, followed by petals, stamens, and then the ovary.

3. **Identifying Nodes and Internodes**: In botanical terms, a node is a part of the stem where leaves or branches originate, while an internode is the segment of the stem between two nodes. In the case of the thalamus, it can be seen as having internodes as well.

4. **Counting Internodes in Thalamus**: The thalamus can be analyzed to identify the number of internodes present. In this case, we can identify three distinct internodes:
- The first internode connects the thalamus to the pedicel (the stalk of the flower).
- The second internode is where the sepals are attached to the thalamus.
- The third internode connects the thalamus to the ovary.

5. **Conclusion**: Therefore, the thalamus represents three internodes in total, as it provides structural support for the floral organs and connects them to the main stem.

**Final Answer**: The thalamus represents three internodes.

---