Morphogenetic movements occurs in

Options

A. Cleavage stage
B. Morula
C. Blastula
D. Gastrula

Answer

To solve the question "Morphogenetic movements occur in," we need to analyze the different stages of embryonic development provided in the options: cleavage stage, morula, blastula, and gastrula.

### Step-by-Step Solution:

1. **Understanding Morphogenetic Movements**:
- Morphogenetic movements refer to the large-scale movements of cells during embryonic development that lead to the formation of different structures and layers in the embryo.

2. **Identifying the Stages of Development**:
- **Cleavage Stage**: This is the initial stage of embryonic development where the zygote divides rapidly without significant growth. The cells are dividing but not undergoing morphogenetic movements.
- **Morula**: This stage follows cleavage and consists of a solid ball of cells. While there is some cellular division, there are no significant morphogenetic movements occurring at this stage.
- **Blastula**: This stage is characterized by the formation of a hollow sphere of cells. Although there is some organization of cells, it is not yet the stage where morphogenetic movements are prominent.
- **Gastrula**: This is the stage where significant morphogenetic movements occur. Cells begin to move and rearrange themselves to form the three germ layers: ectoderm, mesoderm, and endoderm. This process is known as gastrulation.

3. **Conclusion**:
- Based on the analysis, morphogenetic movements primarily occur during the gastrula stage of embryonic development. Therefore, the correct answer is **gastrula**.

### Final Answer:
Morphogenetic movements occur in the **gastrula** stage.

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