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

Question

Assertion: Presence of pneumatophores is a special adaptation of hydrophytes. Reason: Pneumatophores are positively geotropic shoots that have lenticels and help in gaseous exchange. (A) If both assertion and reason are true and reason is the correct explanation of assertion (B) If both assertion and reason are true but reason is not the correct explanation of assertion (C) If assertion is true but reason is false (D) If both assertion and reason are false

Tardigrade Admin · Accepted Answer

Presence of pneumatophores is a special adaptation of halophytes and not of hydrophytes. Halophytes are plants of saline environments, which are adapted to grow in high concentration of salt in soil or water. On the other hand, hydrophytes are the plants which remain permanently submerged or partly submerged in water. Since halophytes are exposed to saline and anaerobic conditions in wetlands, they have developed special adaptations like pneumatophores, etc. Pneumatophores are negatively geotropic roots. The presence of pneumatophores helps to take up oxygen from the atmosphere and transport it to the main roots.

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

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

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

If assertion is true but reason is false

If both assertion and reason are false

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