Centrolecithal eggs are characteristic of

Options

A. Frog
B. Mammals
C. Insecta
D. Star fish

Answer

### Step-by-Step Solution

1. **Understanding Centrolecithal Eggs**:
- Centrolecithal eggs are characterized by having yolk concentrated in the center of the egg. This is a specific type of egg classification based on the distribution of yolk.

2. **Types of Egg Distribution**:
- Eggs can be classified based on yolk distribution into three main types:
- **Isolecithal (or Homolecithal)**: Yolk is evenly distributed throughout the egg.
- **Telolecithal**: Yolk is concentrated at one pole of the egg.
- **Centrolecithal**: Yolk is concentrated in the center of the egg.

3. **Identifying Organisms with Centrolecithal Eggs**:
- The question asks for the organisms that exhibit centrolecithal eggs.
- Upon examination, centrolecithal eggs are primarily found in **insects**.

4. **Examples of Other Egg Types**:
- To further clarify, it's helpful to know examples of the other types:
- **Telolecithal eggs** are found in organisms such as fishes, amphibians (like frogs), reptiles, and birds.
- **Isolecithal eggs** are characteristic of mammals.

5. **Conclusion**:
- Therefore, the answer to the question "Centrolecithal eggs are characteristic of" is **insects**.