Which kingdom includes most diversed group of organisms and has no well defined boundaries ?

Options

A. Monera
B. Protista
C. Fungi
D. Plantae

Answer

To answer the question "Which kingdom includes the most diverse group of organisms and has no well-defined boundaries?", we can follow these steps:

### Step 1: Understand the Question
The question is asking about a biological kingdom that is characterized by a high level of diversity among its organisms and lacks clear boundaries in terms of classification.

### Step 2: Identify the Options
The options provided are:
- Monera
- Protista
- Fungi
- Plantae

### Step 3: Analyze Each Kingdom
- **Monera**: This kingdom includes prokaryotic organisms, primarily bacteria, which have a well-defined characteristic of having a cell wall made of peptidoglycan. Thus, it does not fit the criteria of having no well-defined boundaries.

- **Fungi**: Fungi are eukaryotic organisms with a well-defined characteristic of having cell walls made of chitin. They do not represent a diverse group in the same way as Protista, and their classification is also more defined.

- **Plantae**: This kingdom includes multicellular organisms that are primarily autotrophic and have cell walls made of cellulose. Like fungi, Plantae has well-defined characteristics and boundaries.

- **Protista**: This kingdom is known for its vast diversity, including various eukaryotic organisms that do not fit neatly into the other kingdoms. Protista includes unicellular and simple multicellular organisms, and the classification criteria are not fixed, meaning that the organisms within this kingdom can vary significantly in form and function.

### Step 4: Conclusion
Based on the analysis, the kingdom that includes the most diverse group of organisms and has no well-defined boundaries is **Protista**.

### Final Answer
**Protista**

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