An explant is

Options

A. Dead plant
B. part of the plant
C. part of the plant used in tissue culture
D. part of the plant that expresses a specfic gene

Explanation

### Step-by-Step Text Solution:

1. **Definition of Explant**: An explant is a part of a plant that is used for tissue culture. It can be any plant part, such as a cell, tissue, or organ.

2. **Extraction of Explant**: The explant is extracted from a parent plant. This can be done using sterile techniques to prevent contamination.

3. **Nutritive Medium**: The extracted explant is then placed in a nutritive medium. This medium contains all the essential nutrients required for the growth and development of the plant tissue.

4. **Tissue Culture Process**: The process of growing the explant in the nutritive medium is known as tissue culturing. This allows the cells in the explant to divide and multiply.

5. **Formation of Plantlets**: As the cells divide, they form small plantlets. These plantlets are clones of the original plant from which the explant was taken.

6. **Transplanting**: Once the plantlets have developed sufficiently, they can be transferred to a natural environment where they can grow into mature plants.

7. **Clonal Propagation**: The entire process results in the clonal propagation of the plant, meaning that all the new plants produced are genetically identical to the original plant.