Neural tube is formed by

Options

A. Endoderm
B. Mesoderm
C. Ectoderm
D. Megaspore.

Answer

**Step-by-Step Solution:**

1. **Understanding Neural Tube Formation**: The neural tube is a structure that eventually develops into the central nervous system, which includes the brain and spinal cord.

2. **Identifying the Germ Layers**: In embryonic development, there are three primary germ layers: ectoderm, mesoderm, and endoderm. Each layer gives rise to different tissues and organs in the body.

3. **Role of Ectoderm**: The ectoderm is the outermost layer of the germ layers. It is responsible for forming structures such as the skin, hair, nails, and the nervous system.

4. **Neural Plate Development**: During the process of neurulation, the ectoderm differentiates into a neural plate. This plate then folds and eventually forms the neural tube.

5. **Conclusion**: The neural tube is specifically formed from the ectoderm layer of the embryo.

**Final Answer**: The neural tube is formed by the ectoderm.

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