Question

Assertion (A): Hydrophytes contain aerenchyma, which helps in gaseous exchange and buoyancy.
Reason (R): Mechanical tissues and xylem are poorly developed.

• A. A and R are correct. R is the correct explanation of A
• B. A and R are correct. R is not the correct explanation of A
• C. A is correct but R is incorrect
• D. A is incorrect but R is correct

Hint:

Aerenchyma in hydrophytes is primarily for buoyancy, not directly linked to the lack of mechanical tissue development.

Answer 1

The Correct Option is B

Step 1: Understanding the assertion and reason
Aerenchyma: Hydrophytes contain specialized cells known as aerenchyma, which facilitate gas exchange and provide buoyancy, allowing plants to float on water.
Mechanical tissues and xylem: In hydrophytes, mechanical tissues and xylem are poorly developed, as these plants do not need to withstand as much gravitational force. However, this reason is not directly related to the presence of aerenchyma, which is adapted for buoyancy and not for the development of mechanical tissues or xylem.
Final Answer: \[ A\text{ and }R\text{ are correct. R is not the correct explanation of A.} \]