What is metachronous beating of cilia?

Explanation

### Step-by-Step Solution:

1. **Definition of Cilia**:
- Cilia are membrane-bound extensions of the plasma membrane. They are small, hair-like structures that protrude from the surface of some cells.

2. **Function of Cilia**:
- Cilia serve as locomotory organs, helping in the movement of the cell or the movement of fluids over the cell surface.

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