A) Hydrilla
B) Rhizophora
C) Typha
D) None of these
Correct Answer: B
Solution :
The respiratory roots or pneumatophores are found in some mangrove plants (Rhizophord). Exchange of gases takes place through small pore on the end called pneumathodes (lenticels). The roots are poorly developed in Hydrilla since anchor of the plant and absorption of water and mineral salts is of no means to aquatic plants.
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