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Why were organisms formerly called “blue-green algae” recently moved to a different Kingdom?

Why were organisms formerly called “blue-green algae” recently moved to a different Kingdom?

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Answer: The organisms called as blue green algae is placed in different kingdom called as Monera due to some additional features.

Explanation: Blue green algae is also known as cynobacteria. These organisms are considered as first organism to release the oxygen as they use solar energy , they have pigments and they use water as one of the raw material so they are considered as an organism for converting the reduced atmosphere in to oxidised form( as they use the oxygen and release oxygen as by product).

By this we can conclude that there are some extra features which is not found in normal class of bacteria(Eubacteria) as :

1.They have pigments which consists of Chlorophyll a ( which is membrane bound structure) it is special which make it unique.

2. They do not have flagella which is found in Eubacteria for locomotion.

3.They perform the process of photosynthesis(characteristics of membrane bound organisms)

4. Help in nitrogen fixation due to heterocyst formation.

5. Endosymbiosis that is presence of membrane bound structure inside the bigger bacterial cell is also specific feature which categorise this organism in separate kingdom.

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