Ommatidia are units in the eyes of :

Options

A. Amphibians
B. Mammals
C. Insects
D. Fishes

Answer

**Step-by-Step Solution:**

1. **Understanding Ommatidia**: Ommatidia are the individual visual units that make up the compound eyes of certain animals. Each ommatidium functions as a separate light receptor.

2. **Identifying the Organism**: The question asks which group of animals has ommatidia in their eyes. The options provided are amphibians, mammals, insects, and fishes.

3. **Analyzing the Options**:
- **Amphibians**: They have simple eyes, not compound eyes, and do not possess ommatidia.
- **Mammals**: Similar to amphibians, mammals have simple eyes and lack ommatidia.
- **Fishes**: Fishes also have simple eyes and do not have compound eyes with ommatidia.
- **Insects**: Insects are known for having compound eyes, which are made up of numerous ommatidia.

4. **Conclusion**: Since ommatidia are characteristic features of the eyes of insects, the correct answer is "insects."

**Final Answer**: Ommatidia are units in the eyes of **insects**.

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