Five Kingdom Classification - Disadvantages

Description:

The disadvantages or the limitations of the five kingdom classification system are as follows −

• A distinction between unicellular and multicellular organisms is not possible in case of algae in this system of classification.

• Each group has so many diversities that it is difficult to keep them together. For example, monera and Protista contain both walled and wall-less organisms. Photosynthetic and non-photosynthetic organisms, cellular or filamentous organism.

• Virus has not been included in this kingdom.

• Archaebacteria differ from other bacteria in structure, composition and physiology.

• Mycoplasma are quite different form bacteria where they have been placed along with prokaryotes.

• Symbiotic associations are not considered in this classification system. For example, lichens are organisms which are formed by the symbiotic association between fungi and algae.