External fertilization occurs in animals , which

Options

A. Lay eggs on land
B. Lay eggs in water
C. Oviparous
D. Viviparous

Answer

**Step-by-Step Text Solution:**

1. **Understanding External Fertilization**: External fertilization is a reproductive process where fertilization occurs outside the female's body. This typically involves the release of both sperm (male gamete) and eggs (female gamete) into the environment.

2. **Identifying the Environment**: External fertilization predominantly occurs in aquatic environments. This is because the sperm and eggs need to be in close proximity to ensure successful fertilization, which is more easily achieved in water.

3. **Examples of Animals**: Many species of fish and amphibians reproduce through external fertilization. They release their eggs and sperm into the water, where fertilization takes place.

4. **Analyzing the Options**:
- **Lay eggs on land**: This is incorrect as external fertilization requires a water medium.
- **Lay eggs in water**: This is the correct answer, as it aligns with the process of external fertilization.
- **Oviparous**: This term refers to animals that lay eggs, but does not specifically indicate the fertilization method.
- **Viviparous**: This refers to animals that give birth to live young, which involves internal fertilization.

5. **Conclusion**: Therefore, the correct option is "lay eggs in water," as this is where external fertilization typically occurs.