Question

The cyanobacteria are also referred to as

• A. Protists
• B. Golden algae
• C. Slime moulds
• D. Blue green algae

Answer 1

The Correct Option is D

Cyanobacteria are also referred as blue-green algae. They are members of monera. They are called blue-green algae because they are aquatic and photosynthetic. They are Gram positive photosynthetic prokaryotes which perform oxygenic photosynthesis. They are one of the most successful autotrophic organisms on earth which have mastered all types of environments- fresh water, sea water, salt marshes, moist rocks, tree trunks, moist soils, hot springs, frozen waters. Blue-green algae may be unicellular, colonial or filamentous. Cells are larger and more elaborate than bacteria. Heterocyst is present for nitrogen fixation.