How many times does the ascaris larva undergoes moulting during growth ?

Options

A. Two times
B. four times
C. five times
D. Six times

Answer

To determine how many times the Ascaris larva undergoes moulting during its growth, we can follow these steps:

### Step-by-Step Solution:

1. **Understand Ascaris**: Ascaris lumbricoides, commonly known as the roundworm, is a nematode that infects the human intestine.

2. **Define Moulting**: Moulting is the process by which organisms shed their skin or outer covering, which is essential for growth and development.

3. **Identify the Life Cycle Stages**: The life cycle of Ascaris includes several stages, starting from fertilized eggs to larval stages and finally to adult worms.

4. **Count the Moulting Events**:
- **First Moulting**: Occurs when fertilized eggs hatch in the soil.
- **Second Moulting**: Happens when the larvae infect humans through contaminated food or water and hatch in the bloodstream.
- **Third Moulting**: Takes place when the larvae travel to the lungs via the bloodstream and mature in the alveoli.
- **Fourth Moulting**: The final moulting occurs when the larvae return to the human intestine and develop into adult worms.

5. **Conclusion**: Based on the information gathered, Ascaris lumbricoides undergoes a total of **4 moulting events** during its growth.

### Final Answer:
The Ascaris larva undergoes moulting **4 times** during its growth.

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