Parthenogenesis occurs in

Options

A. Axolotl
B. Miracidium and Metacercaria
C. Cercaria
D. Sporocyst and redia

Answer

**Step-by-Step Solution:**

1. **Understanding Parthenogenesis**:
- Parthenogenesis is a form of asexual reproduction where an egg develops into an embryo without fertilization by sperm. It is often referred to as "virgin birth."

2. **Identifying Examples of Parthenogenesis**:
- Parthenogenesis is observed in several species, particularly among certain insects like aphids, bees, and ants.

3. **Analyzing the Options**:
- The options provided are:
- A) Axolotl
- B) Miracidium and Meta-cercaria
- C) Cercaria
- D) Sporocyst and Radia
- We need to determine which of these options is known to exhibit parthenogenesis.

4. **Evaluating Each Option**:
- **Axolotl**: This is a type of salamander (amphibian) and does not reproduce via parthenogenesis.
- **Miracidium and Meta-cercaria**: These are larval stages of certain parasites but do not specifically indicate parthenogenesis.
- **Cercaria**: This is also a larval stage of certain parasites and does not indicate parthenogenesis.
- **Sporocyst and Radia**: These are larval stages of the liver fluke, where parthenogenesis is commonly found.

5. **Conclusion**:
- The correct answer is **D) Sporocyst and Radia**, as parthenogenesis is commonly observed in these larval stages of the liver fluke.