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  1. The unicellular algae used to supply and regulate the oxygen in space programmes is

    2. A.

     Spyrogyra
    B.

     Chlorella
    C.

     Ulothrix
    D.

     Odogonium

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    Answer : Option B

    Explanation :

    It is estimated that 2.3 kilograms of alga Chlorella pyrenoidosa produce enough oxygen to supply one man is space.

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