In which year, Robert H.Whittaker an American taxonomist, proposed his five kingdom system of classification ?

Options

A. 1965
B. 1969
C. 1972
D. 1989

Answer

To answer the question regarding the year Robert H. Whittaker proposed his five kingdom system of classification, we can follow these steps:

### Step 1: Identify the Taxonomist
- Robert H. Whittaker is the taxonomist in question. He is known for his contributions to biological classification.

### Step 2: Understand the Five Kingdom System
- Whittaker proposed a system that classifies living organisms into five kingdoms:
1. Animalia (animals)
2. Plantae (plants)
3. Fungi (fungi)
4. Protista (simple eukaryotic organisms)
5. Monera (prokaryotic organisms)

### Step 3: Determine the Year of Proposal
- The question asks for the specific year when Whittaker introduced this classification system.

### Step 4: Recall Historical Context
- It is important to remember the timeline of significant contributions in taxonomy. Whittaker's five kingdom system was a notable advancement in the understanding of biological classification.

### Step 5: Select the Correct Option
- Among the options provided (1965, 1969, 1972, 1989), the correct year when Robert H. Whittaker proposed his five kingdom system of classification is **1969**.

### Final Answer
- Therefore, the answer to the question is **1969** (Option B).

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