Every living plant cell should able to regenerate a whole plant : This is a concept of

Options

A. Cell theory
B. Protoplasmic theory
C. Cell culture
D. Totipotency

Answer

**Step-by-Step Solution:**

1. **Understanding the Question**: The question states that every living plant cell is capable of regenerating a whole plant. We need to identify the concept that describes this ability.

2. **Identifying Key Terms**: The term "regenerate" suggests that we are looking for a concept related to the potential of cells to develop into a complete organism.

3. **Exploring the Options**:
- **Cell Theory**: This theory states that all living organisms are made up of cells and that the cell is the basic unit of life. It does not specifically address the regenerative capabilities of cells.
- **Protoplasmic Theory**: This theory focuses on protoplasm as the physical basis of life but does not discuss the regenerative potential of cells.
- **Cell Structure**: This refers to the physical composition and organization of cells, which again does not relate to their ability to regenerate.
- **Totipotency**: This concept refers to the ability of a single cell to divide and produce all the differentiated cells in an organism, including the extra-embryonic tissues. In plants, this means that any living plant cell can potentially regenerate a whole plant.

4. **Conclusion**: Based on the definitions and explanations of the options, the correct answer is **Totipotency**. This term encapsulates the ability of plant cells to regenerate an entire plant.

---