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Q. In the five kingdom system of classification, which single kingdom out of the following can include blue-green algae, nitrogen-fixing bacteria and methangonic archaebacteria?

Punjab PMETPunjab PMET 2010

Solution:

For the classification of living organisms RH Whittaker $(1969)$ proposed a five kingdom system of classification. He designated these five kingdoms as:
(a) Monera-It includes all prokaryotic organisms including bacteria and blue-green algae.
(b) Protista-It includes eukaryotic unicellular organisms, eg. Amoeba.
(c) Plantae-It includes algae, bryophytes, pteridophytes, gymmnosperms and angiosperms.
(d) Fungi-It includes fungi. (e) Animalia-It includes multicellular animals.