If the ectoderm from neural tissue area is removed from the embryo and transplanted in place of presumptive belly ectoderm embryo will develop

Options

A. Without a neural tube
B. With a neural tube
C. With two ectodermal coats
D. With two neural tube

Explanation

To solve the question regarding the transplantation of ectoderm from the neural tissue area into the presumptive belly ectoderm of an embryo, we can break down the reasoning into a series of steps:

### Step-by-Step Solution:

1. **Understanding Ectoderm Layers**:
- The ectoderm is one of the three primary germ layers in the embryo. It gives rise to various structures, including the nervous system (neural ectoderm) and the epidermis (belly ectoderm).

**Hint**: Recall the three germ layers: ectoderm, mesoderm, and endoderm, and their derivatives.

2. **Identifying the Role of Neural Tissue**:
- Neural ectoderm is responsible for forming the neural tube, which eventually develops into the central nervous system (brain and spinal cord). It also has organizing properties that influence surrounding tissues.

**Hint**: Consider how neural ectoderm influences nearby cells and structures during development.

3. **Transplantation Effects**:
- When neural ectoderm is transplanted into the area where belly ectoderm is supposed to develop, the neural ectoderm can induce changes in the surrounding tissues. This is because it acts as an organizer, prompting the surrounding cells to differentiate into neural tissue.

**Hint**: Think about the concept of induction in embryonic development.

4. **Expected Outcome**:
- Since the neural ectoderm will influence the surrounding cells, instead of developing into belly ectoderm, the area will likely develop into neural tissue. Therefore, the embryo will end up with two neural tubes instead of one belly ectoderm.

**Hint**: Visualize the developmental pathways and how the transplanted tissue alters the fate of the surrounding cells.

5. **Conclusion**:
- The correct answer to the question is that the embryo will develop with two neural tubes as a result of the transplantation of neural ectoderm into the presumptive belly ectoderm area.

**Hint**: Review the implications of tissue transplantation in embryonic development to reinforce your understanding.

### Final Answer:
The embryo will develop with **two neural tubes**.