Which of the following structure helps in excretion and conservation of water in terrestrial arthropods?

Options

A. Malpighian body
B. Antennary gland
C. Malpighian tubules
D. Keber's organs

Answer

**Step-by-Step Solution:**

1. **Understanding the Question**: The question asks for the structure that aids in excretion and water conservation in terrestrial arthropods. This indicates a need for a mechanism that allows these organisms to manage water efficiently in a land environment.

2. **Identifying Terrestrial Arthropods**: Terrestrial arthropods, such as cockroaches and grasshoppers, live in environments where water is limited. Therefore, they must have specialized structures to conserve water and excrete waste effectively.

3. **Recognizing the Excretory Structures**: The primary excretory structure in terrestrial arthropods is the Malpighian tubules. These are thin, tubular structures that are crucial for excretion and osmoregulation.

4. **Location of Malpighian Tubules**: Malpighian tubules are located at the junction of the midgut and hindgut of the digestive system in these arthropods. They play a significant role in filtering waste from the hemolymph (the fluid equivalent to blood in arthropods) and concentrating urine to minimize water loss.

5. **Evaluating Other Options**:
- **Malpighian Body**: This is part of the human nephron and is not related to arthropods, making it an incorrect option.
- **Anterior Glands (Green Glands)**: These are found in aquatic arthropods, such as prawns, and are not applicable to terrestrial species.
- **Kebber's Organ**: This structure is associated with certain mollusks and is not relevant to the question.

6. **Conclusion**: Based on the information gathered, the correct answer to the question is that the Malpighian tubules help in excretion and conservation of water in terrestrial arthropods.

**Final Answer**: The structure that helps in excretion and conservation of water in terrestrial arthropods is the **Malpighian tubules**.

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