Number of moults undergone by caterpillar of Bombys mori is

Options

A. 2
B. 4
C. 6
D. 8

Answer

To determine the number of molts undergone by the caterpillar of Bombix mori (the silkworm), we can follow these steps:

### Step-by-Step Solution:

1. **Identify the Organism**: Recognize that Bombix mori is the scientific name for the silkworm.

2. **Understand the Life Cycle**: The life cycle of Bombix mori consists of four stages: ova (egg), larva (caterpillar), pupa (cocoon), and imago (adult).

3. **Focus on the Larval Stage**: The question specifically asks about the caterpillar, which is the larval stage of the silkworm.

4. **Duration of Larval Stage**: The larval stage lasts for approximately 27 days.

5. **Determine the Number of Moults**: During the larval stage, the caterpillar undergoes a total of four molts. Each molt is a shedding of the exoskeleton as the caterpillar grows.

6. **Define Instar**: The period between each successive molt is known as an instar.

7. **Final Answer**: Therefore, the number of molts undergone by the caterpillar of Bombix mori is 4.

### Final Answer:
The number of molts undergone by the caterpillar of Bombix mori is **4**.