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In the five-kingdom classification, $Chlamydomonas$ and $Chlorella$ have been included in
A
Monera
B
Protista
C
Algae
D
Plantae
Detailed Solution
In Whittaker's five-kingdom classification, all unicellular eukaryotic organisms are placed in the kingdom Protista.
$Chlamydomonas$ and $Chlorella$ are unicellular, eukaryotic green algae, so in this system they were brought together with $Paramoecium$ and $Amoeba$ under Protista (NCERT states this directly).
Monera contains only prokaryotes (bacteria and cyanobacteria), so it cannot include these eukaryotic cells.
Plantae contains multicellular, eukaryotic, chlorophyll-bearing organisms; 'Algae' is not a kingdom in the five-kingdom system.
Hence $Chlamydomonas$ and $Chlorella$ are included in Protista.
$Chlamydomonas$ and $Chlorella$ are unicellular, eukaryotic green algae, so in this system they were brought together with $Paramoecium$ and $Amoeba$ under Protista (NCERT states this directly).
Monera contains only prokaryotes (bacteria and cyanobacteria), so it cannot include these eukaryotic cells.
Plantae contains multicellular, eukaryotic, chlorophyll-bearing organisms; 'Algae' is not a kingdom in the five-kingdom system.
Hence $Chlamydomonas$ and $Chlorella$ are included in Protista.