AIIMS 2004 Botany Periderm MCQ Question
In a plant organ which is covered by periderm and in which the stomata are absent, some gaseous exchange still takes place through
aerenchyma
trichomes
pneumatophores
lenticels
Correct Answer
Detailed Explanation
Due to continued formation of secondary tissues in the older stem and roots however the epidermis gets stressed and ultimately tends to rupture.
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