The criterion for the classification of tissue systems into three types is

Options

A. Based on their structure only
B. Based on their function
C. Based on their location in the plant body only
D. Both 1 and 3

Answer

To answer the question regarding the criterion for the classification of tissue systems into three types, we can follow these steps:

### Step-by-Step Solution:

1. **Identify the Types of Tissue Systems**:
- In flowering plants, there are three main types of tissue systems:
- Dermal (or Epidermal) Tissue System
- Ground (or Fundamental) Tissue System
- Vascular Tissue System

2. **Understand the Basis of Classification**:
- The classification of these tissue systems is primarily based on their functions. Each type of tissue system has distinct roles in the plant body.
- **Dermal Tissue System**: Protects the plant and helps in water retention.
- **Ground Tissue System**: Involved in storage, photosynthesis, and support.
- **Vascular Tissue System**: Responsible for the transport of water, nutrients, and food.

3. **Evaluate the Options Given**:
- The question provides four options:
1. Based on structure only
2. Based on function
3. Based on location in the plant body only
4. Based on both structure and location
- Analyzing these options, we find that the most accurate criterion for classification is based on function.

4. **Select the Correct Answer**:
- Since the primary basis for the classification of tissue systems is their function, the correct answer is:
- **Option 2: Based on the function**.