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In the light of recent classification of living organisms into three domains of life (bacteria, archaea, and eukarya), which one of the following statements is true about archaea?
(a)Archaea resemble eukarya in all respects
(b)Archaea have some novel features that are absent in other prokaryotes and eukaryotes
(c)Archaea completely differ from both prokaryotes and eukaryotess
(d)Archaea completely differ from prokaryotes

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Important Questions on Biological Classification
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I. Cyanobacteria are referred to as blue-green algae.
II. They perform oxygenic photosynthesis in chloroplasts.
II. The red-colour of red-sea is due to the presence of a cyanobacterial species Trichodesmium erythraeum.
IV. All the cyanobacterial species can fix atmospheric in specialised cells called heterocysts.

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