The dioecious animal is

Options

A. Liverfluke
B. Hookworm
C. Tapeworm
D. Earthworm

Answer

**Step-by-Step Solution:**

1. **Understanding Dioecious Animals:**
- Dioecious animals are those in which male and female reproductive organs are found in separate individuals. This means that there are distinct male and female organisms.

2. **Identifying Examples of Dioecious Animals:**
- Common examples of dioecious animals include certain species of worms, such as hookworms.

3. **Analyzing the Given Options:**
- The options provided are liver fluke, hookworm, tapeworm, and earthworm.
- We need to determine which of these is dioecious.

4. **Evaluating Each Option:**
- **Liver Fluke:** This is a monoecious animal, meaning it has both male and female reproductive organs in the same individual.
- **Hookworm:** This is a dioecious animal, with separate male and female individuals.
- **Tapeworm:** This is also a monoecious animal, having both reproductive organs in one individual.
- **Earthworm:** Like the liver fluke and tapeworm, earthworms are monoecious.

5. **Conclusion:**
- Based on the analysis, the only dioecious animal from the options provided is the hookworm.

**Final Answer:**
The dioecious animal is the **hookworm**.

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