Mention two important groups of Eubacteria.

Explanation

### Step-by-Step Solution:

1. **Understanding Eubacteria**:
- Eubacteria, also known as "true bacteria," are a major group of prokaryotic microorganisms. They are characterized by their simple cellular structure and lack of membrane-bound organelles.

2. **Characteristics of Eubacteria**:
- Eubacteria can grow under normal environmental conditions and are typically semi-rigid due to the presence of peptidoglycans in their cell walls.

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