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Which of the following pairs is of unicellular algae ? a) Anabaena and volvox

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Which of the following pairs is of unicellular algae ? a) Anabaena and volvox b) Chlorella and spirulina c) Laminaria and Sargossum d) Gelidium and Gracilaria

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b) Chlorella and spirulina

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Chlorella and spirulina are unicellular algae, rich in proteins is used as food supplement even by space travellers. These algae also produce a nutritional biomass that astronauts could eat.

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