What is two kingdom classification? Mention the drawbacks of two kingdom classification?
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Answers
Answer for Class 11 Biology Students
Two kingdoms classification is based on presence or absence of cell wall. All the organisms having cell wall were placed in the Kingdom Plantae and all organisms without cell wall were placed in the Kingdom Animalia.
Draw backs:
No distinction between eukaryotes and prokaryotes. Bacteria, have cell wall, were placed in kingdom Plantae but these have very different cellular organisation (prokaryotes).
No distinction between unicellular and multicellular organisms. Unicellular algae like Chlamydomonas are placed in kingdom Plantae.
No distinction between autotrophic and heterotrophic organisms. Fungi were wrongly placed in kingdom Plantae.
Many organisms do not fall into either category. Example: Lichens are association of fungi and algae. Virus is connecting link between living and non- living.
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