Which animalcule is immortal ?

Options

A. Paramecium
B. Plasmodium
C. Amoeba
D. Euglena

Answer

**Step-by-Step Solution:**

1. **Understanding the Question**: The question asks which microscopic organism, referred to as an "animalcule," is considered immortal. Immortal in this context means that it does not die in the traditional sense.

2. **Defining Animalcule**: An animalcule is a microscopic organism, often used to describe single-celled organisms. The options provided are paramecium, plasmodium, amoeba, and euglena.

3. **Analyzing the Options**:
- **Paramecium**: This is a single-celled organism that reproduces through binary fission, but it does not have the characteristics of immortality.
- **Plasmodium**: This is a genus of parasitic protists that causes malaria. It has a life cycle that involves multiple hosts and does not exhibit immortality.
- **Amoeba**: This organism reproduces asexually through binary fission. When it divides, the parent amoeba splits into two daughter amoebas. The original amoeba does not leave behind any remains, which leads to the perception of immortality.
- **Euglena**: This is a flagellated unicellular organism that can reproduce asexually but does not exhibit immortality.

4. **Conclusion**: Among the given options, amoeba is the organism that is considered immortal. This is because when it reproduces, it divides into two, and the parent cell does not exist anymore, leading to the idea that it does not die.

5. **Final Answer**: The animalcule that is immortal is **Amoeba**.

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