Explant is

Options

A. A small part of plant for tissue culture
B. Exploited part of plant
C. Harvested plant
D. Uprooted part for transplantation.

Answer

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

1. **Understanding the Term "Explant":**
- An explant refers to a small piece of plant tissue that is used for tissue culture. It is a crucial component in plant biotechnology and regeneration.

2. **Identifying the Options:**
- The question provides four options:
A. Small part of plant for tissue culture.
B. Exploited part of plant.
C. Harvested.
D. Uprooted part of plant for transplantation.

3. **Analyzing the Options:**
- Option A describes the explant accurately as it specifies that it is a small part of the plant used specifically for tissue culture.
- Option B ("exploited part of plant") is vague and does not accurately define an explant.
- Option C ("harvested") is too broad and does not specify the context of tissue culture.
- Option D ("uprooted part of plant for transplantation") describes a different process and does not relate to tissue culture.

4. **Conclusion:**
- Based on the definitions and the context of tissue culture, the correct answer is **Option A: A small part of plant for tissue culture**. This aligns with the definition of an explant, which is used in laboratory settings to grow new plant tissues.