How many hexagonal ommatidia are present in each compound eye of cockroach?

Explanation

To determine how many hexagonal ommatidia are present in each compound eye of a cockroach, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding the Structure of Compound Eyes**:
- The compound eyes of a cockroach are made up of multiple units called ommatidia. Each ommatidium is hexagonal in shape.

2. **Identifying the Number of Ommatidia**:
...