Name four types of bacteria on the basis of their shape.

Explanation

To answer the question about the four types of bacteria based on their shape, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding Bacteria**: Begin by recognizing that bacteria are microscopic, single-celled organisms. This foundational knowledge helps in categorizing them.

2. **Identifying Shapes**: Bacteria can be classified based on their shapes. There are four primary shapes that are commonly recognized.

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