Why is suspension culture constantly agitated?

Explanation

**Step-by-Step Solution:**

1. **Definition of Suspension Culture**: Suspension culture is a method of growing cells in a liquid medium. In this setup, either single cells or aggregates of cells (like callus) are suspended in a nutrient-rich liquid.

2. **Agitation in Suspension Culture**: The liquid medium in suspension culture is constantly agitated, typically at a speed of 100 to 250 revolutions per minute (rpm). This agitation is crucial for the culture's success.

3. **Significance of Agitation**:
- **Aeration**: The primary reason for agitation is to maintain aeration in the medium. Continuous agitation ensures that oxygen is supplied to the cells, which is essential for their growth and metabolism.
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