Given figure is of filamentous blue-green alga Nostoc. Identify the parts marked as $A$ and $B$ and

Question

Given figure is of filamentous blue-green alga Nostoc. Identify the parts marked as $A$ and $B$ and select the correct option.

Professor PC Thomas Classes · Answer

(a) : $A$ is heterocyst and $B$ is mucilaginous sheath.