In Whittaker's five kingdom classification unicellular eukaryotes primarily aquatic & having various cell organelles constitute-

Options

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

Answer

To answer the question regarding Whittaker's five kingdom classification and the category that includes unicellular eukaryotes primarily aquatic and having various cell organelles, we can follow these steps:

### Step-by-Step Solution:

1. **Understand Whittaker's Five Kingdom Classification**:
- Whittaker proposed a classification system that divides living organisms into five kingdoms: Monera, Protista, Fungi, Plantae, and Animalia.

2. **Identify Characteristics of Each Kingdom**:
- **Monera**: This kingdom includes prokaryotic organisms, which are unicellular and lack membrane-bound organelles.
- **Protista**: This kingdom consists of unicellular and multicellular eukaryotic organisms. Many protists are aquatic and possess various cell organelles.
- **Fungi**: This kingdom is primarily made up of multicellular eukaryotic organisms that absorb nutrients from their environment.
- **Plantae**: This kingdom includes multicellular eukaryotic organisms that perform photosynthesis.
- **Animalia**: This kingdom consists of multicellular eukaryotic organisms that are heterotrophic.

3. **Focus on Unicellular Eukaryotes**:
- Since the question specifically asks for unicellular eukaryotes, we can eliminate Monera (which is prokaryotic) and the other kingdoms that primarily consist of multicellular organisms (Fungi, Plantae, and Animalia).

4. **Determine the Correct Kingdom**:
- The only kingdom that fits the description of unicellular eukaryotes, primarily aquatic, and having various cell organelles is **Protista**.

5. **Final Answer**:
- Therefore, in Whittaker's five kingdom classification, unicellular eukaryotes that are primarily aquatic and have various cell organelles constitute the kingdom **Protista**.