Morphogenetic movements take place predominantly during the following embryonic stage

Options

A. blastula
B. Morula
C. Gastrula
D. Fertilized eggs

Explanation

**Step-by-Step Solution:**

1. **Understanding Morphogenetic Movements**: Morphogenetic movements refer to the movements of cells during embryonic development that lead to the formation of different tissues and organs. These movements are crucial for the organization of the embryo.

2. **Identifying Germ Layers**: During embryonic development, three primary germ layers are formed:
- Ectoderm (outer layer)
- Mesoderm (middle layer)
- Endoderm (inner layer)

3. **Stages of Embryonic Development**: The embryonic development can be divided into several stages:
- **Fertilized Egg Stage**: The zygote stage where the fertilized egg is a single cell.
- **Cleavage Stage**: The stage where the zygote divides into multiple cells, forming a ball-like structure.
- **Blastula Stage**: Characterized by a fluid-filled cavity known as the blastocoel.
- **Gastrula Stage**: The stage where the three germ layers begin to form through morphogenetic movements.

4. **Focus on Gastrula Stage**: The gastrula stage is where significant morphogenetic movements occur. During this stage, cells migrate inward, leading to the formation of the ectoderm, mesoderm, and endoderm. This is the key stage where the organization of the embryo into distinct layers takes place.

5. **Conclusion**: Based on the above analysis, the embryonic stage where morphogenetic movements predominantly take place is the **Gastrula Stage**.

**Final Answer**: Gastrula Stage

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