Which of the following organisms do not reproduce?

Options

A. Mules
B. Sterile worker bees
C. Infertile human couples
D. All of these

Answer

To solve the question "Which of the following organisms do not reproduce?" we need to analyze each of the provided options carefully.

### Step-by-Step Solution:

1. **Understanding the Options**:
- We have four options to consider:
1. Mules
2. Sterile worker bees
3. Infertile human couples
4. All of these

2. **Analyzing the First Option - Mules**:
- Mules are hybrids resulting from the mating of a male donkey and a female horse.
- Mules are known to be sterile, meaning they cannot reproduce. Therefore, this option does not reproduce.

3. **Analyzing the Second Option - Sterile Worker Bees**:
- Worker bees are typically female bees that do not reproduce.
- Only the queen bee is capable of laying eggs. Hence, sterile worker bees do not reproduce.

4. **Analyzing the Third Option - Infertile Human Couples**:
- Infertile human couples are those who cannot conceive a child.
- This means they cannot produce offspring, so this option also does not reproduce.

5. **Conclusion**:
- Since all three options (mules, sterile worker bees, and infertile human couples) do not reproduce, the correct answer is:
- **All of these**.

### Final Answer:
The correct answer is **All of these**.

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