Which of the following algae are used as food supplements by space travellers?

  • A
    Gellidium
  • B
    Chlorella and Spirulina
  • C
    Algin and Carrageen
  • D
    Chlamydomonas and Spirogyra

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Red algae generally do not produce $......$.

If you are asked to classify different algae into distinct groups,which of the following characteristics would you choose?

Laminarin and mannitol of class-$Phaeophyceae$ (brown algae) are:

The giant algae or seaweeds belong to which class?

The chloroplast in $Spirogyra$ is

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