A feature that is common in yeast, Amoeba, Paramecium is that

Options

A. they all are multicellular
B. they all reproduce by budding
C. they all reproduce by binary fission
D. they all are unicellular.

Explanation

To solve the question regarding the common feature shared by yeast, Amoeba, and Paramecium, we can follow these steps:

### Step-by-Step Solution:

1. **Identify the Organisms**:
- We have three organisms: yeast, Amoeba, and Paramecium.

2. **Classify the Organisms**:
- Yeast is a type of fungus, while Amoeba and Paramecium are both protozoans.

3. **Determine the Cellular Structure**:
- All three organisms are classified as unicellular organisms. This means that each organism consists of a single cell.

4. **Examine Reproductive Methods**:
- Yeast reproduces asexually through a process called budding.
- Amoeba and Paramecium reproduce asexually through binary fission.
- Although their methods of reproduction differ, they all reproduce asexually.

5. **Evaluate the Options**:
- Option 1: They are multicellular - **Incorrect** (all are unicellular).
- Option 2: They all reproduce by budding - **Incorrect** (only yeast does this).
- Option 3: All of them reproduce by binary fission - **Incorrect** (only Amoeba and Paramecium do this).
- Option 4: They all are unicellular - **Correct** (this is the common feature).

6. **Conclusion**:
- The common feature among yeast, Amoeba, and Paramecium is that they are all unicellular organisms.

### Final Answer:
The feature that is common in yeast, Amoeba, and Paramecium is that they all are unicellular.

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