First slide

Secondary Growth

Question

Lenticels are involved in

Easy

A

food transport
B

photosynthesis
C

transpiration
D

gaseous exchange

Solution

At certain regions, the phellogen cuts off closely arranged parenchymatous cells on the outer side instead of cork cells. These parenchymatous cells soon rupture the epidermis, forming a lens shaped opening called lenticels. Lenticels permit the exchange of gases between the outer atmosphere and the internal tissue of the stem. These occur in most woody trees.

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