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 of identifying the false statement about parenchyma, we will analyze each statement provided regarding parenchyma tissue.

### Step-by-Step Solution:

1. **Understanding Parenchyma**:
- Parenchyma is a type of simple tissue in plants, characterized by its cells being similar in structure and function.

2. **Evaluating the Statements**:
- **Statement 1**: "The cells of the parenchyma are generally isodimetric."
- This statement is **true**. Parenchyma cells can be isodimetric, meaning they are approximately equal in all dimensions.

- **Statement 2**: "They are found in both polygonal and elongated shapes."
- This statement is **true**. Parenchyma cells can take various shapes, including polygonal and elongated forms.

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

- **Statement 4**: "The function of parenchyma includes photosynthesis, storage, and secretion."
- This statement is **true**. Parenchyma cells perform various functions, including photosynthesis (in chlorenchyma), storage of substances, and secretion.

3. **Conclusion**:
- The false statement about parenchyma is the third one: "Their walls are thick and made up of pectin."

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

---