Q.The correct statement regarding Blue green algae is

Step 1. Check option (b) - 'presence of cellulose in cell wall'. False. Cyanobacteria, being prokaryotes, do not have a cellulose cell wall; cellulose walls are a eukaryotic-plant/algal feature, not a cyanobacterial one.

Step 2. Check option (c) - 'absence of mucilage around the thallus'. False - it is the reverse. The chapter states that the presence of a mucilage sheath around the thallus is a characteristic feature of this group, which is exactly why cyanobacteria are also called Myxophyceae ('mucilage algae').

Step 3. Check option (d) - 'presence of floridean starch'. False. Floridean starch is the reserve food of red algae (Rhodophyta), not cyanobacteria; cyanobacteria store food as cyanophycean starch instead. …

Match each option against the salient features of Cyanobacteria listed in the ch …

• Confusing cyanophycean starch (Cyanobacteria) with floridean starch (Rhodophyta/red algae) - both are algal reserve-food terms but belong to completely different groups. …