In R.H.Whittaker's five kingdom classification, protista comprisesa)all eukaryotesb)all prokaryotesc)unicellular eukaryotesd)both 'A' and 'B'Correct answer is option 'D'. Can you explain this answer?

Question

Answer

It should be unicellular eukaryotes refer ncert. table given in biological classification chpter.

Answer

Protista is a unicellular eukaryotic .

Answer

The correct answer is 'c' because the prokaryotes are included in kingdom monera and the eukaryotes are included in four kingdoms i.e. protista, fungi, plantae and animalia. Hence to say that protist include all eukaryotes is also wrong...

Answer

Option c is 100% correct :-) unicellular eukaryotes

Answer

It's c it is also written in NCERT class 11 nd d is absolutely wrong becoz here is not even a single Kingdom consists eukaryotes nd prokaryotes together it's also was a base of this classification named as type of cell means eukaryote or prokaryote

Answer

Presence or absence of a well-defined nucleus
The five kingdom system of classification suggested by RH Whittaker is not based on the presence or absence of a well-defined nucleus because this characteristic is not considered a primary criterion for classification in this system. The presence or absence of a nucleus is a fundamental feature used in the classification of organisms in the three-domain system proposed by Carl Woese, where organisms are categorized into Archaea, Bacteria, and Eukarya based on this criterion. In the five kingdom system, organisms are classified based on other criteria such as mode of nutrition, complexity of body organization, and mode of reproduction.

Mode of reproduction
The mode of reproduction is one of the criteria used in the five kingdom system of classification. Organisms are classified into different kingdoms based on their method of reproduction, whether it is sexual or asexual, and the specific mechanisms involved in the reproductive process. This criterion helps in distinguishing between different groups of organisms based on their reproductive strategies.

Mode of nutrition
The mode of nutrition is another important criterion used in the five kingdom system of classification. Organisms are categorized into different kingdoms based on how they obtain their energy and nutrients. This criterion helps in grouping organisms based on whether they are autotrophic (producing their own food through photosynthesis or chemosynthesis) or heterotrophic (obtaining food from other sources).

Complexity of body organization
The complexity of body organization is also a key criterion used in the five kingdom system of classification. Organisms are classified into different kingdoms based on the complexity of their body structures, including the presence of specialized tissues, organs, and organ systems. This criterion helps in differentiating between unicellular and multicellular organisms, as well as between organisms with different levels of complexity in their body organization.

Answer

RH Whittaker's classification is not based on the presence or absence of a well-defined nucleus. He gave a five-kingdom classification and used five criteria for delimiting kingdoms.

These are both come under body organisation

(i) Complexity of cell structure
(ii) Complexity of body structure
(iii) Mode of nutrition
(iv) Ecological life cycle including mode of reproduction
(v)Phylogenetic relationship.

He divided organisms into five kingdoms as follows:

Kingdom - Monera
Kingdom - Protista
Kingdom - Fungi
Kingdom - Plantae
Kingdom - Animalia

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