Solid ball of cell produced by repeated cleavage is called

Options

A. Gastrula
B. Blastula
C. Morula
D. Neurula

Answer

To answer the question "Solid ball of cell produced by repeated cleavage is called", we can follow these steps:

### Step-by-Step Solution:

1. **Understanding Fertilization**: The process begins with fertilization, where a sperm fertilizes an ovum (egg) to form a zygote.

2. **Formation of Zygote**: After fertilization, the zygote is the initial cell that results from the union of the sperm and egg.

3. **Cleavage Process**: The zygote undergoes a series of rapid mitotic divisions known as cleavage. This process does not involve growth; instead, it divides the zygote into smaller cells.

4. **Solid Ball of Cells**: As cleavage continues, the zygote transforms into a solid ball of cells. This structure is formed after several rounds of division.

5. **Identification of the Structure**: The solid ball of cells formed after repeated cleavage is specifically referred to as the "morula".

6. **Further Development**: The morula eventually develops into a blastula, which is a hollow structure with a fluid-filled cavity called the blastocoel.

7. **Conclusion**: Therefore, the correct answer to the question is that the solid ball of cells produced by repeated cleavage is called the "morula".

### Final Answer:
The solid ball of cells produced by repeated cleavage is called the **morula**.

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