Unicellular algae, diatoms and protozoans are members of

Options

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

Answer

To solve the question "Unicellular algae, diatoms and protozoans are members of," we will follow a step-by-step approach:

### Step 1: Identify the Organisms
- We need to recognize the three groups mentioned in the question: unicellular algae, diatoms, and protozoans.
- All three groups are characterized by being unicellular and eukaryotic.

### Step 2: Understand the Classification
- Organisms are classified into different kingdoms based on their characteristics.
- The options provided are Monera, Protista, Fungi, and Plantae.

### Step 3: Analyze Each Option
1. **Monera**: This kingdom includes prokaryotic organisms (like bacteria), which do not fit the description of the organisms in the question since they are eukaryotic. Therefore, Monera is not the correct answer.

2. **Protista**: This kingdom includes unicellular eukaryotic organisms, which encompasses unicellular algae, diatoms, and protozoans. This makes Protista a strong candidate for the correct answer.

3. **Fungi**: This kingdom consists of multicellular and unicellular fungi, which are not classified as algae or protozoans. Hence, this option is incorrect.

4. **Plantae**: This kingdom includes multicellular plants, which are not unicellular and do not include the mentioned groups. Thus, this option is also incorrect.

### Step 4: Conclusion
- Based on the analysis, the correct classification for unicellular algae, diatoms, and protozoans is **Protista**.

### Final Answer
- The answer is **option B: Protista**.

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