What is the Three Kingdom Classification System?
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Three Kingdonm Classification
System
Ernst Haeckel in 1866, classified living organisms into three
kingdoms—Plantae, Protista and Animalia. The new
kingdom—Protista included all those organisms which lack
the capability of tissue differentiation. These are algae, fungi,
and slime moulds. Later,
bacteria
protozoans,
kingdom—Protista was reserved only for unicellular
organisms.
Limitations of Three Kingdom
Classification System
Limitations of three kingdom classification are
(i) Prokaryotes and eukaryotes were not separated.
(ii) Both unicellular and multicellular organisms were kept
in Protista.