Choose the false statement about parenchyma.

Options

A. The cells of the parenchyma are generally isodimetric.
B. They are found in both polygonal and elongated shapes
C. Their walls are thick and made up of pectin
D. The functions of parenchyma include photosynthesis, storage and secretion

Answer

To solve the question "Choose the false statement about parenchyma," we need to evaluate the statements provided about parenchyma cells. Let's break it down step by step.

### Step 1: Understand the Characteristics of Parenchyma
Parenchyma is a type of simple permanent tissue found in plants. The cells of parenchyma have specific characteristics that we need to recall:
- They are generally isodimetric, meaning they are similar in shape and size.
- They can be found in various shapes, including polygonal and elongated.
- Their cell walls are typically thin and primarily made of cellulose.
- Parenchyma cells are involved in various functions such as photosynthesis, storage, and secretion.

### Step 2: Analyze Each Statement
Now let's analyze each statement provided in the question:

1. **The cells of parenchyma are generally isodimetric.**
- This statement is **true**. Parenchyma cells are indeed similar in shape and size.

2. **They are found in both polygonal and elongated shapes.**
- This statement is **true**. Parenchyma cells can be polygonal, elongated, or even spherical.

3. **Their walls are thick and made up of pectin.**
- This statement is **false**. Parenchyma cell walls are thin and primarily made of cellulose, not thick and made of pectin.

4. **The functions of parenchyma include photosynthesis, storage, and secretion.**
- This statement is **true**. Parenchyma cells perform functions such as photosynthesis, storage, and secretion.

### Step 3: Identify the False Statement
From the analysis, the false statement is:
- **Their walls are thick and made up of pectin.** (This is incorrect because parenchyma cell walls are thin and made of cellulose.)

### Conclusion
The false statement about parenchyma is: **"Their walls are thick and made up of pectin."**

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