Beating of cilia Paramecium is

Options

A. Synchronous
B. Matachronous
C. Both A and B
D. No co-ordination.

Answer

To answer the question regarding the beating of cilia in Paramecium, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding Paramecium**: Paramecium is a unicellular organism that belongs to the kingdom Protista. It is covered with numerous hair-like structures called cilia.

2. **Function of Cilia**: The primary function of cilia in Paramecium is to facilitate movement and feeding. The coordinated beating of these cilia allows the organism to swim through water.

3. **Nature of Ciliary Beating**: The beating of cilia in Paramecium is not random; it occurs in a coordinated manner. This coordination is essential for effective movement.

4. **Synchronous and Metachronous Beating**:
- **Synchronous Beating**: This refers to the simultaneous beating of cilia, where all cilia beat at the same time.
- **Metachronous Beating**: This refers to a wave-like pattern of beating, where cilia beat in a sequential manner, creating a wave effect.

5. **Metachronal Wave**: In Paramecium, the cilia beat in a coordinated wave known as a metachronal wave. This means that while some cilia are in the recovery phase, others are in the power stroke phase, leading to an effective swimming motion.

6. **Conclusion**: Since the cilia in Paramecium exhibit both synchronous and metachronous beating, the correct answer to the question is "both A and B".

### Final Answer:
The beating of cilia in Paramecium is both synchronous and metachronous.

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