What is the nature of plant body in different group of plants ?

Explanation

### Step-by-Step Solution:

1. **Introduction to Plant Groups**: The plant kingdom is divided into various groups, each with distinct characteristics regarding their body structure.

2. **Thallophytes (Thallophyta)**:
- **Nature of Plant Body**: Thallophytes are the simplest and lowest plants. They do not have a well-defined plant body.
- **Body Structure**: Their body is not differentiated into roots, stems, or leaves; instead, it is thallus-like.
- **Examples**: Spirogyra, Eulothrix.
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