Q. In woody trees, the exchange of gases between the outer atmosphere and the internal tissue of the stem takes place through
A) Aerenchyma
B) Stomata
C) Pneumatophores
D) Lenticels
Explanation
Lenticels are small pores formed on the surface of stems and roots of higher plants. Lenticels usually arise below the stomata of the original epidermis, where loose packing tissue becomes waterproofed with suberin, leaving large intercellular spaces through which gas exchange can take place.
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.