The type of image and function of ocellus is

Options

A. mosaic, sensitivity to light
B. superposition, insensible to light intensity
C. no image and sensitive to light intensity
D. none of the above

Answer

### Step-by-Step Solution:

1. **Understanding Ocellus**:
- The ocellus is a type of simple eye found in certain invertebrates, including insects like cockroaches. It is different from compound eyes, which are made up of multiple units.

2. **Structure of Ocellus**:
- The ocellus consists of a few photoreceptor cells and is not composed of hexagonal units like the compound eye (which contains ommatidia).

3. **Type of Image Formed**:
- The ocellus does not form a detailed image. Instead, it is responsible for detecting light intensity and changes in light, which means it does not create a clear visual image.

4. **Function of Ocellus**:
- The primary function of the ocellus is sensitivity to light. It helps the organism detect light and dark, which is crucial for behaviors such as navigation and avoiding predators.

5. **Conclusion**:
- The type of image formed by the ocellus is "no image," and its function is "sensitivity to light."

### Final Answer:
- The type of image formed by the ocellus is "no image," and its function is "sensitivity to light."

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