Formation of an organised structure from tissue culture is called

Options

A. regeneration
B. hardening
C. cloning
D. All of these

Answer

**Step-by-Step Text Solution:**

1. **Understanding the Question:**
The question asks about the process of forming an organized structure from tissue culture. Tissue culture is a technique used to grow plant cells, tissues, or organs in a controlled environment.

2. **Analyzing the Options:**
- **Option 1: Regeneration**
- In the context of tissue culture, regeneration refers to the ability of plant cells to develop into a whole plant. This is the process where cells divide and differentiate to form organized structures such as shoots or roots.
- **Option 2: Hardening**
- Hardening is a process that involves acclimatizing tissue-cultured plants to external environmental conditions. It does not refer to the formation of organized structures.
- **Option 3: Cloning**
- Cloning in this context typically refers to the process of producing genetically identical copies of a plant. While tissue culture can be used for cloning, it does not specifically refer to the formation of organized structures.
- **Option 4: All of these**
- This option suggests that all previous options are correct, which is not the case since only one option accurately describes the formation of organized structures.

3. **Identifying the Correct Answer:**
Based on the analysis, the correct answer is **Regeneration**. This is because regeneration specifically refers to the process of forming organized structures from tissue culture.

**Final Answer:**
Formation of an organized structure from tissue culture is called **Regeneration**.

---