Microvilli of each retinular cell collectively form 

Options

A. rhadbome
B. rhabdomere
C. crystalline cone
D. retinula

Answer

To solve the question regarding what the microvilli of each retinular cell collectively form, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding Retinular Cells**:
- Retinular cells are specialized photoreceptor cells found in the compound eyes of arthropods. They play a crucial role in vision by detecting light.

2. **Identifying Microvilli**:
- Microvilli are tiny, finger-like projections that increase the surface area of cells. In the context of retinular cells, they are involved in the process of light absorption.

3. **Collective Structure Formation**:
- The question asks what the microvilli of each retinular cell collectively form. It is important to note that these microvilli do not form the retinula itself, as the retinula is made up of the retinular cells.

4. **Evaluating Options**:
- The options given are:
- Ratbomb
- Raptomyr
- Crystalline cone
- Retinula
- We can eliminate "retinula" since it refers to the group of retinular cells, not the structure formed by microvilli.

5. **Correct Answer Identification**:
- The correct answer is "Raptomyr." The microvilli of each retinular cell collectively form a structure known as the raptomyr, which is involved in enhancing the light-detecting capability of the retinular cells.

### Final Answer:
The microvilli of each retinular cell collectively form the **raptomyr**.

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