How many types of tissue systems are present in plants on the basis of morphology and location according to Van sachs

Options

A. 1
B. 4
C. 2
D. 3

Answer

To answer the question regarding the types of tissue systems present in plants based on morphology and location according to Van Sachs, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding Tissue Systems**:
- In plants, tissue systems are categorized based on their morphology (structure) and location (where they are found in the plant).

2. **Identifying the Types of Tissue Systems**:
- According to Van Sachs, there are three main types of tissue systems in plants:
- **Dermal Tissue System**: This is the outer protective layer of the plant, primarily composed of epidermal cells. It often secretes a waxy cuticle to prevent water loss.
- **Vascular Tissue System**: This system is responsible for the conduction of water, nutrients, and food throughout the plant. It consists mainly of two types of tissues: xylem (which transports water and minerals) and phloem (which transports organic nutrients).
- **Ground Tissue System**: This includes all the tissues that are neither dermal nor vascular. Ground tissue is involved in various functions such as photosynthesis, storage, and support. It comprises three types of tissues: parenchyma, collenchyma, and sclerenchyma.

3. **Conclusion**:
- Based on the above classifications, the total number of tissue systems present in plants according to Van Sachs is **three**: dermal, vascular, and ground tissue systems.

### Final Answer:
The correct answer is **3**.

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