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Question

Which one is a nitrogen fixer blue green algae?

A
Ulothrix
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B
Anabaena
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C
Ulva
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D
Hydrodictyon
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Solution

The correct option is B Anabaena
Anabaena is a Blue Green algae. It is a unicellular prokaryotic organism. It does not have membrane-bound organelles or true nucleus. It is used as nitrogen fixing bacteria. It fixes atmospheric nitrogen into ammonia and make it available to the plants.
Thus, the correct answer is 'Anabaena.'

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