In Tippo's classification the group atracheata includes :–

Options

A. Thallophyta
B. Bryophyta
C. All the vascular plants
D. All the non-vascular plants

Answer

To answer the question regarding what group is included in Tippo's classification under Atracheata, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Classification System**:
- The classification in question is by Oswald Tippo, who classified the plant kingdom into two main groups: Thalophyta and Embryophyta.

2. **Identify the Characteristics of Each Group**:
- **Thalophyta**: This group includes organisms that have a thallus-like structure and do not possess an embryo. It includes algae and fungi.
- **Embryophyta**: This group has a differentiated organ level and includes an embryo. It is further divided into Bryophyta and Tracheophyta.

3. **Focus on Bryophyta**:
- Bryophyta is also referred to as Atracheata. This group is characterized by a dominant gametophytic generation and the absence of vascular tissues.

4. **Determine the Types of Plants in Atracheata**:
- Since Atracheata (or Bryophyta) includes non-vascular plants, it does not include any vascular plants. Therefore, it consists solely of non-vascular plants.

5. **Conclude the Answer**:
- Based on the classification and characteristics discussed, the group Atracheata includes all non-vascular plants, which is synonymous with Bryophyta.

### Final Answer:
The group Atracheata in Tippo's classification includes **all non-vascular plants (Bryophyta)**.