Outer covering of Paramecium is known as

Options

A. Pellicle
B. Cuticle
C. Plasmalemma
D. Plasma membrane.

Answer

To answer the question "What is the outer covering of Paramecium known as?", we can follow these steps:

### Step-by-Step Solution:

1. **Identify the Organism**: Paramecium is a unicellular organism that belongs to the kingdom Protista. It is classified as a eukaryote, which means it has a defined nucleus and organelles.

2. **Understand the Structure**: The shape of Paramecium resembles that of a shoe and typically ranges in size from 50 to 300 micrometers.

3. **Examine the Cell Components**: Paramecium contains two types of nuclei: a macronucleus, which is involved in vegetative functions, and a micronucleus, which is responsible for reproduction.

4. **Identify the Outer Covering**: The outer covering of Paramecium is specifically referred to as the "pellicle." This is a flexible and thin layer that provides support to the cell membrane.

5. **Differentiate Between Structures**:
- The **pellicle** is the outer covering.
- The **plasma membrane** (or plasma lemma) is located just beneath the pellicle and is not considered the outer covering.
- The term **cuticle** is not applicable here as it refers to a different type of structure found in other organisms.

6. **Conclusion**: Therefore, the correct answer to the question is that the outer covering of Paramecium is known as the **pellicle**.

### Final Answer:
The outer covering of Paramecium is known as the **pellicle**.

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