Organisms without any specific shape are

Options

A. Viruses
B. Mycoplasma
C. Bacteria
D. Cyanobacteria.

Answer

**Step-by-Step Solution:**

1. **Understanding the Question**: The question asks for organisms that do not have any specific shape. This implies we need to identify organisms that lack a defined structure.

2. **Analyzing the Options**:
- **Option 1: Virus**: Viruses have a specific structure, typically consisting of a protein coat and genetic material. Therefore, they do not fit the criteria of lacking a specific shape.
- **Option 2: Mycoplasma**: Mycoplasma are a genus of bacteria that lack a cell wall. The absence of a cell wall means they do not have a definite shape, making them a strong candidate for the answer.
- **Option 3: Bacteria**: Most bacteria have a cell wall, which gives them a specific shape (like cocci, bacilli, etc.). Thus, they do not qualify as organisms without a specific shape.
- **Option 4: Cyanobacteria**: Like regular bacteria, cyanobacteria also possess a cell wall and therefore have a specific shape.

3. **Identifying the Correct Answer**: Based on the analysis, the only organism that lacks a cell wall and, consequently, does not have a specific shape is Mycoplasma. Therefore, the correct answer is **Option 2: Mycoplasma**.

4. **Conclusion**: Mycoplasma is the only organism listed that does not have a specific shape due to the absence of a cell wall.

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