Question

The small aerating pores seen on cork layer of woody stem are

• A. Guard cells
• B. Subsidiary cells
• C. Trichomes
• D. Lenticels

Answer 1

The correct option is D Lenticels

The external phellem or cork is impermeable to conduction or exchange of gasses. It is not a continuous zone; a few gaps are seen in cork. In these gaps, a mass of parenchyma cells (complementary tissue) is located known as lenticels. These help in exchange of gasses, between the atmosphere and inner cortical cells. Lenticels are characteristics of the woody stem.

So, the correct answer is option D.