Question

What are the demerits of five kingdom classification?

CLASS - XI BIOLOGY (Biological Classification)

Answer 1

-unicellular algae like chlamydomonas, chlorella, volvox etc...were included in the kingdom plantae
-slime moulds with cell wall quite different from other protists were included in that kingdom
-the  kingdom monera and protista include autotrophic and heterotrophic organisms , organisms with cell wall and organisms without cell wall are seen. So these kingdoms are heterogenous groups
-different members of three kingdom evolved from different ancestors 

Answer 2

ANSWER :-

Fungi are placed in a separate kingdom as their mode of nutrition differs . ‎ ‎ ‎ ‎ ‎‎There is no place for viruses.

Better than two kingdom classification. ‎ ‎ ‎ ‎ ‎ ‎ ‎‎Similar organisms are kept far from each other. For example- Unicellular and multicellular algae.