A feature of reproduction that is common to Amoeba, Spirogyra and Yeast are that

Options

A. they reproduce asexually.
B. they are all unicellular.
C. they reproduce only sexually.
D. they are all multicellular.

Explanation

To solve the question regarding the common feature of reproduction in Amoeba, Spirogyra, and Yeast, we can follow these steps:

### Step-by-Step Solution:

1. **Identify the Organisms**:
- We are looking at three organisms: Amoeba, Spirogyra, and Yeast.

2. **Understand the Reproductive Methods**:
- **Amoeba**: Reproduces asexually through binary fission, where one parent cell divides into two daughter cells.
- **Spirogyra**: Although it can reproduce sexually, it can also reproduce asexually through fragmentation, where the filamentous structure breaks into pieces, each of which can grow into a new individual.
- **Yeast**: Reproduces asexually through budding, where a new organism develops from an outgrowth of the parent.

3. **Analyze the Options**:
- A) They reproduce asexually.
- B) They are all unicellular.
- C) They reproduce only sexually.
- D) They are all multicellular.

4. **Evaluate Each Option**:
- **Option A**: Correct, as all three organisms can reproduce asexually.
- **Option B**: Incorrect, as Spirogyra is multicellular (filamentous).
- **Option C**: Incorrect, as all three can reproduce asexually.
- **Option D**: Incorrect, as not all are multicellular.

5. **Conclusion**:
- The correct answer is **A) They reproduce asexually**.

### Final Answer:
A feature of reproduction that is common to Amoeba, Spirogyra, and Yeast is that **they reproduce asexually**.

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