Which of the following are unicellular organisms?

Options

A. Worms
B. Bacteria
C. Animal
D. Plants

Answer

To determine which of the following are unicellular organisms, we will analyze the options provided.

### Step-by-Step Solution:

1. **Understand Unicellular Organisms**:
- Unicellular organisms are those that consist of a single cell. Examples include bacteria, protozoa, and some algae.

2. **Review the Options**:
- The options provided are:
- A) Worms
- B) Bacteria
- C) Animals
- D) Plants

3. **Analyze Each Option**:
- **Option A: Worms** - Worms are multicellular organisms. They consist of multiple cells and are not unicellular.
- **Option B: Bacteria** - Bacteria are unicellular organisms. They are made up of a single cell and are a prime example of unicellular life.
- **Option C: Animals** - Animals are multicellular organisms. They are composed of many cells and do not fall under the category of unicellular organisms.
- **Option D: Plants** - Plants are also multicellular organisms. They consist of multiple cells and are not unicellular.

4. **Conclusion**:
- From the analysis, the only option that represents a unicellular organism is **Option B: Bacteria**.

### Final Answer:
- The unicellular organism among the options given is **Bacteria**.