Home
Class 12
BIOLOGY
Assertion (A): Aerenchyma is the chief a...

Assertion (A): Aerenchyma is the chief anatomical adaptation of hydrophytes.
Reason (R): Aerenchyma helps the plant in the exchange of gases and gives buoyancy.

A

If both the assertion and the reason are true and the reason is a correct explanation of the assertion

B

If both the assertion and reason are true but the reason is not a correct explanation of the assertion

C

If the assertion is true but the reason is false

D

If both the assertion and reason are false

Text Solution

Verified by Experts

The correct Answer is:
A

Hydrophytes are plants that live in an abundance of water and thus display few adaptations to reduce water loss in the leaves. These leaves display aerenchyma a loosely organized parenchymatous tissue with wide intercellular spaces containing air that provide buoyancy to plant.
Promotional Banner

Similar Questions

Explore conceptually related problems

Aerenchyma is helpful to plants by -

Assertion: Presence of pneumatophores is a special adaptation of hydrophytes Reason: Pneumatophores are positively in gaseous exchange.

How do plants and animals help each other in the exchange of gases in the atmosphere?

Assertion: Presence of pneumatophores is a special adaptation of hydrophytes. Reason: Pneumatophores are positively geotropic shoots that have lenticels and help in gaseous exchange.

Assertion : Aquatic plants contain aerenchyma. Reason : Aerenchyma keeps aquatic plants affloat .

Assertion (A): Lipases help in emulsification of fats. Reason (R): Lipases hydrolyses fats and oils.

[A]: Aerenchyma is a characteristic of litho- phyte. [R]: It is a specialised tissue for buoyancy in lithophytes

Assertion (A): Alveoli contain an extensive network of blood vessels. Reason (R): Alveoli is the site where exchange of gases occurs.