Identify the living plant tissues , whose main function is to provide buoyancy to the plant .

Options

A. Sclerenchyma fibres
B. Sclereids
C. Collenchyma
D. Modified parenchyma

Answer

To solve the question, "Identify the living plant tissues whose main function is to provide buoyancy to the plant," we can follow these steps:

### Step 1: Understand Plant Tissues
Plant tissues are generally categorized into two main types: simple tissues and complex tissues. Simple tissues consist of one type of cell, while complex tissues are made up of multiple cell types.

**Hint:** Remember the two main categories of plant tissues: simple and complex.

### Step 2: Identify Simple Permanent Tissues
The simple permanent tissues include:
- Parenchyma
- Collenchyma
- Sclerenchyma

**Hint:** Focus on the characteristics of these simple tissues to determine their functions.

### Step 3: Analyze the Function of Each Tissue
- **Parenchyma:** This tissue is living and has various functions, including storage, photosynthesis, and providing buoyancy in aquatic plants due to its large air cavities.
- **Collenchyma:** This tissue provides support to growing parts of the plant but does not contribute to buoyancy.
- **Sclerenchyma:** This tissue is dead at maturity and provides structural support, so it does not provide buoyancy.

**Hint:** Consider which tissues are living and their specific functions related to buoyancy.

### Step 4: Focus on Aquatic Plants
In aquatic plants, the parenchyma tissue is modified to form a specialized type called aerenchyma, which contains large air cavities that help the plant float.

**Hint:** Look for the specific adaptation in aquatic plants that aids in buoyancy.

### Step 5: Conclusion
Based on the analysis, the living plant tissue that provides buoyancy is **parenchyma**, specifically the modified form known as **aerenchyma**.

**Final Answer:** The correct answer is **parenchyma**.