Question

Statement A: Cyanobacteria are characterised by the absence of flagellum throughout life cycle.
Statement B: Cyanobacteria are gram negative photosynthetic prokaryotes.
1.Only A is correct
2.Only B is correct
3.Both A and B are correct
4.Both A and B are incorrect​

Answer 1

Explanation:

Cyanobacteria are photosynthetic blue green algae with prokaryotic structure. They are members of monera. They are called blue-green algae because they are aquatic and photosynthetic. They are green due to presence of chloroplasts. 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.

Answer 2

Answer:

c. both statement A and B are correct

Explanation:

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