Compare the statements a and b Statement a. To counteract the increase in turgor preassure in plant cells the cell wall produces an equal and opposite pressure, i.e., wall pressure Statement b.When plant cells undergo endosmosis, they swell but do not burst .

Options

A. Both the statements a and b are correct and a is reason for b
B. Statement a is correct and b is wrong
C. Statement a is wrong and b is correct
D. Both the statemets a and b are correct and a is not the reason for b .

Answer

To compare the statements A and B, we will analyze each statement in detail and determine their validity and relationship.

### Step-by-Step Solution:

1. **Understanding Statement A**:
- Statement A states that to counteract the increase in turgor pressure in plant cells, the cell wall produces an equal and opposite pressure, known as wall pressure.
- Turgor pressure is the pressure exerted by the fluid (usually water) inside the plant cell against the cell wall. As water enters the cell, it swells, increasing turgor pressure.
- The cell wall, being rigid, exerts an opposing pressure (wall pressure) to prevent the cell from bursting. This is a fundamental concept in plant physiology.

2. **Understanding Statement B**:
- Statement B claims that when plant cells undergo endosmosis, they swell but do not burst.
- Endosmosis refers to the process where water enters the cell from a surrounding solution, typically when the cell is placed in a hypotonic solution (lower solute concentration outside the cell).
- As water enters, the cell swells due to increased turgor pressure. However, the rigid cell wall prevents the cell from bursting, allowing the cell to become turgid (swollen and firm).

3. **Comparing the Two Statements**:
- Both statements are correct. Statement A explains the mechanism (the relationship between turgor pressure and wall pressure) that allows Statement B to occur (the swelling of the cell without bursting).
- In essence, the wall pressure generated by the cell wall is what allows the plant cell to maintain its structure and integrity during the process of endosmosis.

4. **Conclusion**:
- Both statements A and B are correct, and Statement A provides the reasoning for Statement B. The cell wall's ability to exert wall pressure is crucial for the turgidity of plant cells during osmosis.

### Final Answer:
Both statements A and B are correct, and A is the reason for B.

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