Question

Exchange of gases between air and the internal tissues of older corky stems takes place through.

• A. Sieve plates
• B. Pits
• C. Stomata
• D. Lenticels

Answer 1

Answer: (D)

Lenticels

A. Sieve plates – the septa present between two adjacent sieve tubes, meant for translocation of solutes.

B.Pits – thin areas present on the secondary cell wall, meant for intercellular transportation.

C. Stomata – small pores, present on the epidermis of aerial organs meant for transpiration and exchange of gases.

D.Lenticels – the large sized, slightly raised spots or aerating pores present on the surface of cork, meant for exchange of gases.

So, the correct option is ‘Lenticels’.