The simple plant-like organs that lack roots, stems or leaves are:

Options

A. protozoans
B. algae
C. virusd
D. fungi

Explanation

**Step-by-Step Solution:**

1. **Understanding the Question**: The question asks for simple plant-like organs that do not have roots, stems, or leaves. This indicates that we are looking for organisms that are similar to plants but lack the complex structures typically associated with them.

2. **Analyzing the Options**: The options given are protozoans, algae, viruses, and fungi. We need to evaluate each option to determine which one fits the description.

3. **Evaluating Protozoans**:
- Protozoans are unicellular eukaryotic organisms that belong to the protist kingdom.
- They are heterotrophs, meaning they cannot make their own food and rely on other organisms for nutrition.
- Since they are not plants and do not perform photosynthesis, they do not fit the criteria.

4. **Evaluating Algae**:
- Algae are simple plant-like organisms that belong to the plant kingdom.
- They are autotrophs, which means they can perform photosynthesis and produce their own food.
- Algae lack true roots, stems, and leaves, and their main body is thalloid (a simple structure).
- This makes algae a suitable candidate as they match the description given in the question.

5. **Evaluating Viruses**:
- Viruses are acellular entities that cannot be classified as living organisms.
- They do not have cellular structures like roots, stems, or leaves and do not perform photosynthesis.
- Therefore, viruses do not fit the criteria of being plant-like.

6. **Evaluating Fungi**:
- Fungi are also not classified as plants; they are a separate kingdom.
- They are heterotrophs and depend on other organisms for food.
- Like protozoans and viruses, fungi do not meet the criteria of being plant-like organs.

7. **Conclusion**: After evaluating all options, the only organism that fits the description of being a simple plant-like organ that lacks roots, stems, or leaves is **algae**.

**Final Answer**: Algae

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