Morphogenetic movements take place during

Options

A. Formation of morula
B. Blastulation
C. Gastrulation
D. Organogenesis.

Answer

**Step-by-Step Solution:**

1. **Understanding Morphogenetic Movements**: Morphogenetic movements refer to the large-scale movements of embryonic epithelial cells that help in shaping the embryo. These movements are crucial for the proper arrangement and distribution of cells during development.

2. **Identifying the Context**: The question asks during which developmental stage morphogenetic movements occur. The options provided are:
- A) Formulation of morula
- B) Plastylation
- C) Gastrulation
- D) Organogenesis

3. **Analyzing Each Option**:
- **A) Formulation of morula**: This stage involves the division of the zygote into a solid ball of cells but does not involve significant morphogenetic movements.
- **B) Plastylation**: This term is not commonly associated with morphogenetic movements in embryonic development.
- **C) Gastrulation**: This is a critical phase where major morphogenetic movements occur, leading to the formation of the three germ layers: ectoderm, mesoderm, and endoderm.
- **D) Organogenesis**: This stage involves the formation of organs from the germ layers but is preceded by gastrulation.

4. **Conclusion**: Based on the analysis, the correct answer is **C) Gastrulation**, as this is the stage where significant morphogenetic movements take place, resulting in the establishment of the germ layers.

**Final Answer**: C) Gastrulation

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