Cells of collenchyma differ from parenchyma cells mainly in

Options

A. Lacking protoplasm
B. Possesing unevenly thickened walls
C. Containing chloroplasts
D. Being meristematic

Answer

To answer the question "Cells of collenchyma differ from parenchyma cells mainly in," we will analyze the characteristics of both cell types and identify the key differences.

### Step-by-Step Solution:

1. **Understand Collenchyma Cells**:
- Collenchyma cells are living cells that provide support to the plant.
- They are characterized by having unevenly thickened cell walls, which are primarily made up of cellulose, hemicellulose, and pectin.
- These cells are elongated and are typically found in areas of the plant that require flexibility and support, such as young stems and petioles.

2. **Understand Parenchyma Cells**:
- Parenchyma cells are the most common type of plant cells and are also living cells.
- They are generally soft, succulent, and have thin cell walls.
- Parenchyma cells are involved in various functions such as storage (of starch, oils, and water), photosynthesis (in chlorenchyma), and tissue repair.

3. **Identify Key Differences**:
- The primary difference between collenchyma and parenchyma cells lies in the structure of their cell walls.
- Collenchyma cells have unevenly thickened walls, while parenchyma cells have thin walls.

4. **Evaluate the Options**:
- The options given were:
a) Lacking protoplasm
b) Possessing unevenly thickened walls
c) Containing chloroplasts
d) Being medistrumatic
- Based on our analysis, the correct option is **b) possessing unevenly thickened walls**, as this is the main characteristic that differentiates collenchyma from parenchyma cells.

### Final Answer:
Cells of collenchyma differ from parenchyma cells mainly in **possessing unevenly thickened walls**.

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