Question

Whittaker is famous for
a. Two kingdom classification
b. Four kingdom classification
c. Five kingdom classification
d. Distinguishing in bacteria and blue-green algae

Answer 1

Hint: Various scientists employed various ways of classifying living organisms but Whittaker proposed that organisms should be grouped based on the structure of the cell, mode of nutrition, and source of nutrition, body organization, and reproduction. Whittaker became famous in 1969 after the massive discovery of the kingdom classification of the organisms.

Complete answer:
> Option A: The two-kingdom classification system was given by Carolus Linnaeus in 1758, who classified living things into two kingdoms: Animal Kingdom (mobile and heterotrophic) and Plant Kingdom (fixed, stationary in the soil, autotrophic).

> Option B: Haeckel proposed the four kingdom classification. He divided the living organisms into four kingdoms namely Monera, Protista, Metaphyta, and Animalia.

> Option C: R.H Whittaker proposed the five-kingdom classification in 1969, in which all living organisms are divided into five kingdoms based on their complexity of cell structure, the complexity of the organism’s body, and mode of nutrition.
The five kingdoms are Monera, Protista, Fungi, Plantae, and Animalia which were finally proposed by Whittaker.
Hence, the correct answer is option (C).

Note: Five kingdoms of classification were proposed by RH Whittaker in 1969. He divided all living organisms into five kingdoms based on the following features:
• The complexity of cell structures
• The complexity of body structures
• Mode of obtaining nutrition
• Ecological lifestyle
• Phylogenetic relationship
• The five kingdoms proposed by him were:
• Kingdom Monera which includes prokaryotes.
• Kingdom Protista which includes unicellular eukaryotes.
• Kingdom Fungi which includes fungi.
• Kingdom Plantae which includes multicellular eukaryotic plants.
• Kingdom Animalia includes multicellular animals.