Egg of Cockroach is

Options

A. Alecithal
B. Oligolecithal
C. Microlecithal
D. Centrolecithal

Answer

To answer the question "Egg of Cockroach is?", we will analyze the characteristics of the cockroach egg and determine its classification.

### Step-by-Step Solution:

1. **Understanding Egg Types**:
- Eggs can be classified based on the distribution and amount of yolk present. Common classifications include oligolecithal, mesolecithal, and telolecithal eggs.

2. **Identifying the Yolk Distribution**:
- The cockroach egg contains a significant amount of yolk that is concentrated at one pole of the egg. This type of yolk distribution is referred to as centrolecithal.

3. **Cytokinesis in Cockroach Eggs**:
- During the process of cytokinesis in centrolecithal eggs, the cleavage is meroblastic. This means that the cleavage does not divide the entire egg but only the part that contains the yolk.

4. **Meroblastic Cleavage**:
- In meroblastic cleavage, the cleavage plane extends only to the accumulated yolk, which is superficial due to the presence of large, dense yolk. This is a characteristic feature of centrolecithal eggs.

5. **Delayed Embryonic Development**:
- The large yolk in centrolecithal eggs supports delayed embryonic development, allowing the embryo to develop over a longer period.

6. **Conclusion**:
- Based on the characteristics of the cockroach egg, we conclude that the egg of a cockroach is classified as **centrolecithal**.

### Final Answer:
The egg of a cockroach is **centrolecithal**.

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