Protozoa,fungi,aigae,prokarwyoticandeukaryoticmicrodes
Answers
It is definitely a very interesting question to solve and do some brainstorming.
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Living organisms are subdivided into 5 major kingdoms according to R.H. Whittaker, including the Monera, the Protista (Protoctista), the Fungi, the Plantae, and the Animalia.
Each kingdom is further subdivided into separate phyla or divisions. Generally "animals" are categorised into phyla, while "plants" are categorised into divisions.
The basic characteristics of each kingdom and approximate number of species are :-
1. Kingdom Monera [10,000 species]: Unicellular and colonial--including the true bacteria (eubacteria) and cyanobacteria (blue-green algae). Eukaryotic Cells With Nuclei And Membrane-Bound Organelles:
2. Kingdom Protista (Protoctista) [250,000 species]: Unicellular protozoans and unicellular & multicellular (macroscopic) algae with 9 + 2 cilia and flagella (called undulipodia).
3. Kingdom Fungi [100,000 species]: Haploid and dikaryotic (binucleate) cells, multicellular, generally heterotrophic, without cilia and eukaryotic (9 + 2) flagella (undulipodia).
4. Kingdom Plantae [250,000 species]: Haplo-diploid life cycles, mostly autotrophic, retaining embryo within female sex organ on parent plant.
5. Kingdom Animalia [1,000,000 species]: Multicellular animals, without cell walls and without photosynthetic pigments, forming diploid blastula.
The advantages of Whittaker's Five Kingdom Classification are as follows:
-- Prokaryotes differ from all other living organisms in their cell structure and cell multiplication; physiological and biochemical processes.
-- Prokaryotes have been placed separately Kingdom Monera whereas Unicellular and multi- cellular organisms are kept separate.
-- Fungi are also placed in a separate kingdom as their mode of nutrition differs from all other plants.
-- Autotrophs and heterotrophs are also kept separately based on their mode of nutrition
-- Five kingdom classification is more natural than two kingdom classification and is based on bio composition and mode of nutrition.
The disadvantages of Whittaker's Five Kingdom Classification are as follows:
-- Though Unicellular algae are kept in kingdom Protista, but algae- like multicelluar organisms are in kingdom Plantae. So, thumb rule is that similar organisms must be put together.
-- There is diversity in kingdom Protista and dissimilar organisms should not be placed together.
-- All organisms other than Moneran shows their polyphyletic origin which is a limitation of five kingdom classification.
-- Viruses have no separate space for them.