Morphogenetic movements convert hollow spherical blastula into

Options

A. morula
B. gastrula
C. foetus
D. embryonic disc

Answer

**Step-by-Step Solution:**

1. **Understanding the Question**: The question asks about the morphogenetic movements that convert a hollow spherical blastula into another structure.

2. **Identifying the Stages of Development**: In embryonic development, the process begins with fertilization, leading to the formation of a zygote. This zygote undergoes multiple mitotic divisions, known as cleavage.

3. **Formation of Morula**: After several rounds of cleavage, the zygote develops into a solid ball of cells called the morula, which typically consists of 8 to 16 cells.

4. **Formation of Blastula**: The morula then transforms into a hollow spherical structure known as the blastula, which contains a fluid-filled cavity called the blastocoel.

5. **Morphogenetic Movements**: The next phase involves morphogenetic movements, which are processes that lead to the reorganization of cells. These movements convert the blastula into a structure known as the gastrula.

6. **Formation of Gastrula**: During gastrulation, the blastula undergoes significant changes, resulting in the formation of the gastrula, which has a cup-like shape and establishes three germ layers: ectoderm, mesoderm, and endoderm.

7. **Conclusion**: Therefore, the correct answer to the question is that morphogenetic movements convert the hollow spherical blastula into the gastrula.

**Final Answer**: The hollow spherical blastula is converted into the gastrula.

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