Internal fertilization, oviparous condition exhibited by

Options

A. Heterometrus
B. Wuchereria
C. Ascaris
D. Chaetopterus

Answer

To solve the question regarding which organism exhibits internal fertilization and an oviparous condition, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Terms**:
- **Internal Fertilization**: This refers to the process where fertilization occurs inside the female's body.
- **Oviparous**: This refers to organisms that lay eggs, with the development of the embryo occurring outside the mother's body.

2. **Evaluate the Options**:
- We need to analyze the reproductive methods of the given organisms to determine which one exhibits both internal fertilization and oviparous conditions.

3. **Analyze Heterometrus**:
- Heterometrus is a scorpion and belongs to the Arthropoda phylum. It is known for external fertilization, where males deposit sperm on the eggs laid by females. Therefore, it does not fit our criteria.

4. **Analyze Ucheria**:
- Ucheria is a parasitic worm that reproduces through microfilarial stages. The reproduction does not involve internal fertilization in the typical sense and is not oviparous. Thus, it is not the correct option.

5. **Analyze Ascaris**:
- Ascaris is a parasitic roundworm. It exhibits internal fertilization where the male and female copulate, and the fertilized eggs are produced inside the female's body. After fertilization, Ascaris lays a large number of eggs (3000 to 5000), which are then expelled from the body, indicating an oviparous condition.

6. **Analyze Chytopterus**:
- Chytopterus is a polychaete worm that undergoes external fertilization, similar to Heterometrus, and does not meet the criteria for internal fertilization or oviparous conditions.

7. **Conclusion**:
- Based on the analysis, the only organism that exhibits both internal fertilization and an oviparous condition is **Ascaris**.

### Final Answer:
**Ascaris exhibits internal fertilization and an oviparous condition.**

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