Rapidly dividing unorganised mass of cells in tissue culture is

Options

A. Callose
B. Callus
C. Embryoid
D. Plantlet

Answer

To solve the question "Rapidly dividing unorganised mass of cells in tissue culture is:", we can follow these steps:

### Step 1: Understand the Concept of Tissue Culture
Tissue culture is a technique where cells or tissues are isolated from an organism and grown in an artificial environment. This process allows for the growth of cells outside their natural environment.

**Hint:** Remember that tissue culture involves growing cells in a controlled setting.

### Step 2: Identify the Key Terms
In the question, the key terms are "rapidly dividing," "unorganized mass," and "cells." These terms suggest that we are looking for a specific type of cell growth that is not structured.

**Hint:** Focus on the characteristics of the cell mass described in the question.

### Step 3: Recall the Types of Cell Masses in Tissue Culture
In tissue culture, when explants (small pieces of plant or animal tissues) are cultured, they can form different structures. Some common terms associated with these structures include:
- Callus
- Embryoid
- Plantlet

**Hint:** Think about what each term means in the context of tissue culture.

### Step 4: Define Each Option
- **A. Callus:** A mass of cells that is unorganized and rapidly dividing, typically formed from plant tissues during tissue culture.
- **B. Callus:** (Duplicate of A)
- **C. Embryoid:** A structure that resembles an embryo, formed from callus but is more organized.
- **D. Plantlet:** A small, young plant that has developed from tissue culture.

**Hint:** Identify which of these options describes a mass of cells that is both rapidly dividing and unorganized.

### Step 5: Choose the Correct Answer
Given the definitions, the correct answer to the question is **A. Callus** (or B, since it is a duplicate). Callus is indeed the term used for a rapidly dividing, unorganized mass of cells in tissue culture.

**Hint:** Make sure to select the option that directly corresponds to the description given in the question.

### Final Answer
The answer to the question is **A. Callus** (or B, as it is a duplicate).