Give the differences between thallophyta and bryophyta.

Explanation

### Step-by-Step Solution:

1. **Definition of Thallophyta and Bryophyta:**
- **Thallophyta**: This group includes simple, non-flowering plants such as algae. The main plant body is thalloid, meaning it does not have differentiated roots, stems, or leaves.
- **Bryophyta**: This group includes mosses and liverworts. They are known as the amphibians of the plant kingdom because they require water for sexual reproduction.

2. **Structure of Sex Organs:**
- In **Thallophyta**, the sex organs are **single-celled**. For example, Spirogyra is a type of green algae in this category.
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