One of the following animal has no metamorphosis in its life cycle

Options

A. Pheretima
B. Asterias
C. Musca
D. Butterfly

Answer

To determine which of the following animals has no metamorphosis in its life cycle, we will analyze each option provided:

1. **Understanding Metamorphosis**:
- Metamorphosis refers to the developmental process where an animal undergoes significant changes in form and often habits after the embryonic stage. This process can be complete or incomplete.

2. **Analyzing the Options**:
- **Ferritima (Earthworm)**: Earthworms do not undergo metamorphosis. They develop directly from juvenile forms to adults without any drastic changes in body structure.
- **Astarias (Starfish)**: Starfish undergo a form of metamorphosis, transitioning from larval to adult forms.
- **Musca (Housefly)**: Houseflies undergo complete metamorphosis, which includes distinct stages: egg, larva, pupa, and adult.
- **Butterfly**: Butterflies also undergo complete metamorphosis, transitioning through egg, larval (caterpillar), pupal (chrysalis), and adult stages.

3. **Conclusion**:
- Based on the analysis, the only option that does not undergo metamorphosis is **Ferritima (Earthworm)**.

Thus, the correct answer is **Ferritima**.