First slide
Kingdom Monera
Question

Statement A: Cyanobacteria are different from other Eubacteria.

Statement B: All Cyanobacteria have Heterocysts. 

Easy
Solution

Cyanobacteria are different from Eubacteria in being oxygenic photosynthetic organisms and most of them like Nostoc and Anabaena have heterocysts. Other eubacteria do not have heterocysts.

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