Which of the following is not present in life cycle of Locusts?

Options

A. Egg
B. Nymph
C. Naiad
D. Imago

Answer

To solve the question regarding which stage is not present in the life cycle of locusts, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Life Cycle of Locusts**:
- The life cycle of locusts consists of several stages: egg, nymph, and imago.

2. **Identify the Stages**:
- **Egg Stage**: This is the initial stage where locusts lay eggs.
- **Nymph Stage**: After hatching from the eggs, locusts enter the nymph stage, which involves several molts as they grow.
- **Imago Stage**: This is the adult stage of locusts, where they are fully developed and capable of reproduction.

3. **Recognize the Terminology**:
- The term "nymph" refers to the juvenile form of insects that undergo incomplete metamorphosis.
- The term "naiad" is typically used for the aquatic immature stages of certain insects, particularly those that undergo complete metamorphosis (like dragonflies and mayflies).

4. **Determine the Incorrect Option**:
- Given the stages present in locusts (egg, nymph, and imago), the term "naiad" does not apply to locusts, as they do not have an aquatic stage in their life cycle.

5. **Conclusion**:
- Therefore, the stage that is not present in the life cycle of locusts is the "naiad" stage.

### Final Answer:
The stage that is not present in the life cycle of locusts is **naiad**.

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