Primary function of stem is to -

Options

A. Helps in respiration
B. Absorb water and minerals
C. Bear leaves and braches
D. Help in vegetative reproduction

Answer

### Step-by-Step Solution

1. **Understanding the Structure of the Stem**:
- The stem is a crucial part of a plant's morphology. It consists of nodes and internodes. Nodes are the points on the stem where leaves and branches arise, while internodes are the segments between the nodes.

2. **Identifying the Functions of the Stem**:
- The primary function of the stem is to support the plant and provide a structure for the leaves and branches to grow. This support allows leaves to be positioned optimally for sunlight exposure.

3. **Role of Nodes**:
- Nodes play a significant role in the stem's function. They are the locations where leaves and branches emerge. Each leaf that develops from a node contributes to the plant's ability to perform photosynthesis.

4. **Photosynthesis**:
- The leaves, which are attached to the stem at the nodes, are essential for photosynthesis. This process allows the plant to convert sunlight into energy, using carbon dioxide and water.

5. **Conclusion**:
- Therefore, the primary function of the stem is to support the plant structure and facilitate the growth of leaves and branches, which are vital for the process of photosynthesis.

### Final Answer
The primary function of the stem is to support the plant and enable the growth of leaves and branches, which are essential for photosynthesis.

---