NEET2020BotanyBiological ClassificationActual
Which of the following is incorrect about Cynobacteria?
Options
- AThey are photoautotrophs
- BThey lack heterocysts
- CThey often form blooms in polluted water bodies
- DThey have chlorophyll- a similar to green plants
Correct answer
B. They lack heterocysts
Step-by-step solution
The cyanobacteria or blue-green algae ( BGA ) have chlorophyll- a similar to green plants and are photosynthetic autotrophs. The BGA are unicellular, colonial or filamentous, freshwater, marine or terrestrial algae. The colonies are generally surrounded by a gelatinous sheath. They often form blooms in polluted water bodies. Some of these organisms can fix atmospheric nitrogen in a specialised cells called heterocysts.