Question

The five kingdom classification was proposed by: ____.

• A. Linnaeus
• B. Whittaker
• C. Darwin
• D. Haeckel

Hint:

To remember the chronological expansion of kingdoms, think of the numbers: 2 Kingdoms (Linnaeus) $\rightarrow$ 3 Kingdoms (Haeckel) $\rightarrow$ 5 Kingdoms (Whittaker).

Answer 1

The Correct Option is B

Step 1: Understanding the Concept:
Biological classification is the scientific arrangement of organisms into hierarchical categories based on their structural, evolutionary, and physiological relationships.

Step 2: Detailed Explanation:

• R.H. Whittaker (1969): Proposed the Five Kingdom Classification. The kingdoms defined by him were Monera, Protista, Fungi, Plantae, and Animalia. The main criteria for classification used by him included cell structure, body organization, mode of nutrition, reproduction, and phylogenetic relationships.
• Carolus Linnaeus: Proposed the Two Kingdom system (Plantae and Animalia).
• Ernst Haeckel: Proposed the Three Kingdom system (introducing Protista).

Step 3: Final Answer:
The five kingdom classification was proposed by Whittaker.

Answer 2

The question asks who proposed the five kingdom system of classification, so each scientist's actual contribution needs to be checked against that specific claim.

1. Linnaeus: Carolus Linnaeus is credited with the much earlier two-kingdom system, splitting all living things into just Plantae and Animalia. He did not propose a five-kingdom scheme.
2. Whittaker: R.H. Whittaker, in 1969, proposed dividing life into five kingdoms - Monera, Protista, Fungi, Plantae, and Animalia - based on features like cell structure, mode of nutrition, and body organisation. This matches the question directly.
3. Darwin: Charles Darwin's major contribution was the theory of evolution by natural selection, not a system of classifying organisms into kingdoms.
4. Haeckel: Ernst Haeckel proposed an earlier three-kingdom system that added Protista to Linnaeus's two kingdoms, but stopped short of the five-kingdom scheme.

Only Whittaker's classification system divides organisms into five kingdoms.

Therefore, the correct answer is Whittaker.