Name the character of Phylum Aschelminthes which differentiates it from all other Phyla of Kingdom Animalia

Options

A. Parasitic mode
B. Round in shape
C. Pseudocoelomate
D. Bilateral symmetry.

Answer

To solve the question about the distinguishing character of Phylum Aschelminthes, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Question**: The question asks for a specific characteristic of Phylum Aschelminthes that sets it apart from all other phyla in the Kingdom Animalia.

2. **Review the Options**: The options provided are:
- A) Parasitic mode
- B) Round in shape
- C) Pseudocelomate
- D) Bilateral symmetry

3. **Analyze Each Option**:
- **A) Parasitic mode**: While many Aschelminthes are parasitic, this trait is not unique to them as other phyla also contain parasitic organisms.
- **B) Round in shape**: This is a general description and not a defining characteristic of the phylum.
- **C) Pseudocelomate**: This is a specific term that refers to organisms that have a body cavity (coelom) that is not entirely lined by mesoderm. This is a key characteristic of Aschelminthes.
- **D) Bilateral symmetry**: This is a common characteristic found in many animal phyla, not unique to Aschelminthes.

4. **Identify the Unique Characteristic**: The defining characteristic of Phylum Aschelminthes is that they are **pseudocelomate**. This means that their body cavity is derived from the blastocele and not from the mesoderm, which differentiates them from other phyla that have true coeloms.

5. **Conclusion**: Based on the analysis, the correct answer is **C) Pseudocelomate**.

### Final Answer:
The character of Phylum Aschelminthes that differentiates it from all other phyla of Kingdom Animalia is **Pseudocelomate**.

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