Highest degree of differentiation of the body is reached in

Options

A. Paramecium
B. euglena
C. trpanosoma
D. amoeba

Answer

To solve the question regarding the highest degree of differentiation of the body, we will analyze the options provided in the context of cellular differentiation and complexity in organisms.

### Step-by-Step Solution:

1. **Understanding Differentiation**:
Differentiation refers to the process by which cells become specialized in structure and function. The highest degree of differentiation is typically found in multicellular organisms where cells have specialized functions.

2. **Identifying Organisms**:
The question implies that we need to compare different organisms to determine which has the highest degree of differentiation. The organisms mentioned in the transcript include:
- Paramecium
- Euglena
- Trypanosoma
- Amoeba

3. **Analyzing Paramecium**:
Paramecium is a unicellular organism with specialized structures like cilia for movement and oral grooves for feeding. However, it is still a single-celled organism, which limits its degree of differentiation.

4. **Analyzing Euglena**:
Euglena is also a unicellular organism but possesses features of both plants and animals. It has chloroplasts for photosynthesis and can also feed heterotrophically. While it has specialized organelles, it is still unicellular.

5. **Analyzing Trypanosoma**:
Trypanosoma is a unicellular parasitic organism. It has adaptations for living in a host but does not exhibit a high degree of differentiation compared to multicellular organisms.

6. **Analyzing Amoeba**:
Amoeba is a unicellular organism that uses pseudopodia for movement and feeding. It is less differentiated than the others mentioned.

7. **Conclusion**:
Among the organisms discussed, Euglena shows a higher degree of differentiation due to its combination of plant and animal characteristics and the presence of various organelles. However, it is still unicellular. The question may imply that the highest degree of differentiation is typically found in multicellular organisms, but since the options provided are all unicellular, Euglena is the most differentiated among them.

### Final Answer:
The highest degree of differentiation of the body is reached in **Euglena**.