Which of the following algae is used as food supplements even by space travellers?
A
Chlorella
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B
Gracilaria
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C
Spirullina
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D
Both a and c
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Solution
The correct option is D Both a and c Chlorella and Spirullina are unicellular algae, rich in proteins and are used as food supplements even by space travellers.
Gracilaria are used to grow microbes and in preparations of ice-creams and jellies.