In which of the following animal clevage divisions are restricted to a small part of cytoplasm & nucleus in animal pole of egg ?

Options

A. Cockroach
B. Frog
C. Chick
D. Rabbit

Answer

To solve the question regarding which animal has cleavage divisions restricted to a small part of the cytoplasm and nucleus in the animal pole of the egg, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Types of Eggs**:
- The question refers to a specific type of egg known as "telolecithal" eggs. These eggs have a large amount of yolk concentrated at one pole (the vegetal pole) and a small amount of cytoplasm and nucleus at the opposite pole (the animal pole).

2. **Identify the Characteristics of Telolecithal Eggs**:
- In telolecithal eggs, due to the high concentration of yolk at the vegetal pole, cleavage (the process of cell division) is restricted to the small area of cytoplasm and nucleus at the animal pole. This means that the cleavage divisions occur only in the animal pole where the cytoplasm and nucleus are located.

3. **Analyze the Given Options**:
- **Option A: Cockroach** - Cockroaches have a different type of egg structure and are not classified as reptiles or birds.
- **Option B: Frog** - Frogs are amphibians and their eggs are not telolecithal.
- **Option C: Chick** - Chicks are birds, and they have telolecithal eggs where cleavage is restricted to the animal pole.
- **Option D: Rabbit** - Rabbits are mammals and do not have telolecithal eggs.

4. **Select the Correct Answer**:
- Based on the analysis, the only option that fits the criteria of having cleavage divisions restricted to a small part of cytoplasm and nucleus in the animal pole of the egg is **Option C: Chick**.

### Final Answer:
The correct answer is **Option C: Chick**.