Presence of carapace, green glands and cephalothorax are feature of

Options

A. Crustacea
B. Chiilopoda
C. Diplopoda
D. Insecta

Answer

**Step-by-Step Solution:**

1. **Identify the Features**: The question mentions three specific features: carapace, green glands, and cephalothorax. We need to understand what each of these features represents.

2. **Define Carapace**: A carapace is a hard protective shell found in certain animals, particularly in crustaceans like crabs and lobsters. It serves as a protective covering for the body.

3. **Define Green Glands**: Green glands are excretory organs found in some arthropods, specifically in crustaceans. They help in the excretion of waste materials.

4. **Define Cephalothorax**: The cephalothorax is a body structure where the head and thorax are fused together. This is characteristic of certain groups of arthropods.

5. **Analyze the Options**: The question likely provides multiple options. We need to evaluate which group of animals possesses all three features mentioned.

6. **Evaluate Crustacea**: Crustaceans, which include lobsters, prawns, and crabs, exhibit all three features:
- They have a carapace (hard covering).
- They possess green glands (excretory organs).
- Their body structure includes a cephalothorax (fused head and thorax).

7. **Evaluate Other Options**:
- **Chilopoda** (centipedes) and **Diplopoda** (millipedes) do not have a carapace or cephalothorax as their bodies are segmented into distinct head, thorax, and abdomen.
- **Insecta** also has a segmented body with distinct head, thorax, and abdomen, lacking a cephalothorax.

8. **Conclusion**: Based on the analysis, the correct answer is **Crustacea**, as it is the only group that possesses all three features: carapace, green glands, and cephalothorax.

---