Which of the following characteristic is not found in parenchyma?

Options

A. It forms the major component within organs
B. Their walls are thick and made up of cellulose
C. They may either be closely packed or have small intercellular spaces
D. The parenchyma performs various functions like photosynthesis storage and secretion

Explanation

To determine which characteristic is not found in parenchyma, we will analyze the options provided based on the properties of parenchyma tissue.

### Step-by-Step Solution:

1. **Understanding Parenchyma**:
- Parenchyma is a type of simple permanent tissue in plants. It is composed of living cells that have thin cell walls and are capable of performing various functions such as storage, photosynthesis, and secretion.

2. **Analyzing the Options**:
- **Option 1**: "Forms the major component within the organs."
- This statement is **correct**. Parenchyma is indeed a major component of many plant organs, as it is the most common type of plant tissue.

- **Option 2**: "The walls are thick and made up of cellulose."
- This statement is **incorrect**. Parenchyma cells have thin walls, not thick walls. They are primarily made of cellulose, but the walls are not thick.

- **Option 3**: "They have either closely packed or have small intercellular spaces."
- This statement is **correct**. Parenchyma cells can be closely packed, but they also have intercellular spaces that allow for gas exchange and storage.

- **Option 4**: "They perform various functions like photosynthesis, storage, and secretion."
- This statement is **correct**. Different types of parenchyma, such as chlorenchyma (which contains chlorophyll for photosynthesis) and aerenchyma (which provides buoyancy), perform various functions.

3. **Conclusion**:
- The characteristic that is **not found** in parenchyma is that "the walls are thick." Therefore, the answer is **Option 2**.

### Final Answer:
The characteristic that is not found in parenchyma is: **The walls are thick and made up of cellulose.**

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