Question

Statement 1: Well aerating tissue aerenchyma is the most important anatomical feature of all hydrophytes.
Statement 2: Hydrophytes live in well aerated environment

• A. Statement 1 is true, statement 2 is false
• B. Statement 1 and statement 2 are true
• C. Statement 1 and statement 2 are false
• D. Statement 1 is false, statement 2 is true

Hint:

Aerenchyma helps hydrophytes survive in oxygen-poor aquatic environments by internal gas transport.

Answer 1

The Correct Option is A

Hydrophytes are plants that live submerged or floating in water, and the two statements test whether you understand both their key adaptation and the actual oxygen conditions they deal with.

1. Statement 1, aerenchyma is the most important anatomical feature of hydrophytes: Aerenchyma is a parenchyma tissue riddled with large air spaces, and it is exactly this feature that lets a submerged plant store air, stay buoyant, and move oxygen down to tissues cut off from the atmosphere. It is fair to call this the single most defining anatomical trait of hydrophytes, so this statement is true.
2. Statement 2, hydrophytes live in a well aerated environment: Standing or submerged water holds very little dissolved oxygen compared with air, and waterlogged soil around a hydrophyte's roots is often oxygen starved. If hydrophytes actually lived in well aerated surroundings, they would have no need to evolve aerenchyma in the first place. So this statement contradicts the very adaptation described in statement 1, and is false.

Because aerenchyma exists specifically to cope with poor aeration, statement 1 is true while statement 2, which claims the opposite condition, is false.

Let's summarize:

• Aerenchyma: air filled tissue, key adaptation of hydrophytes, statement 1 holds.
• Hydrophyte habitats are oxygen poor, not well aerated, so statement 2 fails, and it also contradicts why aerenchyma evolved at all.

So statement 1 is true and statement 2 is false.