What are the main functions of a stem?

Explanation

### Step-by-Step Solution:

1. **Support and Upright Position**: The primary function of a stem is to uphold the plant, maintaining it in an upright position. This structural support allows the plant to grow towards sunlight and facilitates photosynthesis.

2. **Bearing Leaves, Flowers, and Fruits**: The stem serves as a support structure for leaves, flowers, and fruits. It holds these essential parts of the plant, allowing them to be positioned optimally for growth and reproduction.

3. **Transport of Water and Minerals**: The stem is responsible for conducting water and mineral salts from the roots to the leaves and fruits. This transportation is crucial for the plant's survival and growth, as it ensures that all parts receive the necessary nutrients.

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