The characters of thallophyta is/are :-

Options

A. Plant body thallus
B. Non vascular plant
C. Sex organ are unicellular and without jacket of sterile cell
D. All the above

Answer

### Step-by-Step Solution:

1. **Understanding Thallophyta**:
- Thallophyta is a division of the plant kingdom that includes simple, non-vascular plants. These plants do not have differentiated structures like roots, stems, or leaves. Instead, they have a body called a thallus.

2. **Identifying Key Characteristics**:
- The main characteristics of Thallophyta include:
- **Thallus Structure**: The plant body is a thallus, which is undifferentiated and lacks true roots, stems, and leaves.
- **Non-Vascular Nature**: Thallophytes are non-vascular plants, meaning they do not have a vascular system (xylem and phloem) for transporting water and nutrients.
- **Reproductive Structures**: The reproductive organs in many thallophytes are unicellular, and they often do not have a protective jacket of sterile cells around them.

3. **Evaluating the Options**:
- **Option 1**: Plant body is a thalus.
- This is correct as thallophytes are characterized by having a thallus.
- **Option 2**: Non-vascular plants.
- This is also correct since thallophytes lack vascular tissues.
- **Option 3**: Reproductive organs are unicellular and without a jacket of sterile cells.
- This statement is correct as well, as many thallophytes have unicellular reproductive organs without protective layers.

4. **Conclusion**:
- All the provided options correctly describe the characteristics of Thallophyta. Therefore, the answer is that all the statements about Thallophyta are correct.