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  • In a plant organ which is covered by periderm and in which the stomata are absent, some gaseous exchange still takes place through  Option: 1</str

In a plant organ which is covered by periderm and in which the stomata are absent, some gaseous exchange still takes place through

 

Option: 1

Aerenchyma


Option: 2

Trichomes


Option: 3

Pneumatophores

 


Option: 4

Lenticels


Answers (1)

Mature stems of woody plants have a peripheral waterproof tissue called cork (phellem).

A number of scars known as lenticels are found on the surface of the cork.

Lenticels allow the gaseous exchange between the atmosphere and living cells below the cork and also take part in transpiration (0.1%). 

Therefore, In a plant organ, which is covered by periderm and in which the stomata are absent, some gaseous exchange still takes place through Lenticels. Hence, the correct answer is option 4.

Posted by

Sumit Saini

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