Accumulation of cells and formation of a bud at the site of amputation is

Options

A. Morphallaxis
B. Reparative bud
C. Blastema
D. Both A and B

Answer

To solve the question "Accumulation of cells and formation of a bud at the site of amputation is", we need to analyze the given options and understand the biological processes involved in regeneration.

### Step-by-Step Solution:

1. **Understanding the Question**: The question is asking about a biological process that occurs when a part of an organism is amputated, leading to the accumulation of cells and the formation of a new structure (bud).

2. **Analyzing the Options**:
- **Morphallaxis**: This refers to the regeneration of body parts through the rearrangement of existing tissues rather than the formation of new cells. It is not primarily about the accumulation of cells.
- **Reparative Buds**: This term refers to new structures that form in response to injury or senescence (aging). However, it does not specifically denote the accumulation of cells at the site of amputation.
- **Blastema**: This is a mass of cells that forms at the site of amputation and is responsible for the regeneration of lost structures. It is characterized by the accumulation of cells that will eventually differentiate into the new organ or part.

3. **Identifying the Correct Answer**: Given that the question specifically mentions "accumulation of cells and formation of a bud," the most appropriate term that fits this description is **blastema**. This is because blastema is formed from the accumulation of cells at the site of injury, leading to the regeneration of the lost part.

4. **Conclusion**: Therefore, the correct answer to the question is **Blastema**.

### Final Answer:
The accumulation of cells and formation of a bud at the site of amputation is best described as **Blastema**.

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