3 public questions tagged with this topic.
The five-kingdom system places single-celled eukaryotic organisms in Kingdom Protista. Thus, Chlamydomonas and Chlorella, although previously grouped with plants and possessing cell walls, are included in Protista.
Ref: NCERT Class 11 Biology Chapter 2: Biological Classification Five Kingdom Classification and Kingdom Plantae Animalia
The three-domain system divides Kingdom Monera into two domains. The remaining eukaryotic kingdoms are placed in the third domain, producing a six-kingdom classification.
Ref: NCERT Class 11 Biology Chapter 2: Biological Classification Five Kingdom Classification and Kingdom Plantae Animalia
While lower taxonomic categories like species, genera, and families are defined by a relatively high number of similar, specific morphological characters, higher taxonomic categories such as Order and Class are identified based on the aggregates of characters. Orders assemble multiple families that share a few key, broader defining features.
Ref: NCERT Class 11 Biology
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