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Q.
Before the five-kingdom system, organisms such as Chlamydomonas and Spirogyra were classified under:
NTA AbhyasNTA Abhyas 2022
Solution:
Earlier classification systems included bacteria, blue-green algae, fungi, mosses, ferns, gymnosperms and the angiosperms under ‘Plant’ kingdom. The character that unified this whole kingdom was that all these organisms had a cell wall in their cells. This placed groups together which widely differed in other characteristics. It brought together the prokaryotic bacteria and the blue-green algae (cyanobacteria) with other groups which were eukaryotic. It also grouped together the unicellular organisms and the multicellular ones, for example, Chlamydomonas and Spirogyra were placed together under algae.