Unicellular organism are capable of

Options

A. Independent existence
B. performing the essential function of life
C. well organized organ system
D. both (a) and (b)

Answer

To solve the question regarding the capabilities of unicellular organisms, we can break it down into a step-by-step analysis of the options provided.

### Step-by-Step Solution:

1. **Understanding Unicellular Organisms**:
- Unicellular organisms are made up of a single cell. This means that all the life processes occur within that one cell.

2. **Evaluating Option A**:
- The statement claims that unicellular organisms can have independent existence.
- Since they consist of only one cell, they do not rely on other cells or organisms to survive.
- **Conclusion**: This statement is correct.

3. **Evaluating Option B**:
- The statement claims that unicellular organisms perform essential functions of life.
- A cell is the fundamental unit of life, meaning that even a single cell can carry out all necessary life functions such as metabolism, reproduction, and response to stimuli.
- **Conclusion**: This statement is also correct.

4. **Evaluating Option C**:
- The statement claims that unicellular organisms are capable of organ systems.
- Organ systems are made up of multiple cells organized into tissues, organs, and systems. Since unicellular organisms consist of only one cell, they cannot form organ systems.
- **Conclusion**: This statement is incorrect.

5. **Final Evaluation**:
- Based on the analysis, Options A and B are correct, while Option C is incorrect. Therefore, the correct answer is the option that states both A and B are correct.

6. **Final Answer**:
- The correct answer is Option 4, which states that both A and B are correct.