Number of criteria used in classifying organisms in five kingdom classification is

Options

A. 5
B. 4
C. 6
D. 2

Answer

### Step-by-Step Solution:

1. **Understanding the Five Kingdom Classification**: The Five Kingdom Classification was proposed by R.H. Whittaker in 1969. It categorizes living organisms into five distinct kingdoms based on various criteria.

2. **Identifying the Criteria**: The classification is based on six important criteria:
- **Cell Structure**: This criterion differentiates organisms based on whether their cells are prokaryotic (without a nucleus) or eukaryotic (with a nucleus).
- **Body Organization**: This criterion distinguishes between unicellular organisms (made of one cell) and multicellular organisms (made of multiple cells).
- **Nutritional Mode**: This criterion considers how organisms obtain their nutrition, categorizing them as autotrophs (organisms that produce their own food) or heterotrophs (organisms that consume other organisms for food).
- **Phylogenetic Relationships**: This criterion looks at the evolutionary relationships among organisms, determining whether they are closely related or distantly related.
- **Ecological Role**: This criterion assesses the major ecological roles of organisms, classifying them as producers, consumers, or decomposers.
- **Lifestyle**: This criterion evaluates whether an organism's lifestyle is independent (able to survive on its own) or dependent (relying on other organisms for survival).

3. **Conclusion**: After analyzing the criteria used in the Five Kingdom Classification, we find that there are a total of **six criteria**.

4. **Final Answer**: The number of criteria used in classifying organisms in the Five Kingdom Classification is **six**.