Is Squilla, respiration occurs through

Options

A. Book lungs
B. Tracheae
C. Gills
D. Book gills.

Answer

**Step-by-Step Solution:**

1. **Identify the Organism**: The question asks about Squilla, which is a type of shrimp. It is important to recognize that Squilla belongs to the class Crustacea within the phylum Arthropoda.

2. **Understand the Respiration Process**: In crustaceans like Squilla, respiration primarily occurs through gills. Gills are specialized organs that allow the extraction of dissolved oxygen from water.

3. **Review the Options**: The options provided are:
- A) Book lungs
- B) Trachea
- C) Gills
- D) Book gills

4. **Eliminate Incorrect Options**:
- **Book lungs**: These are respiratory structures found in arachnids (like scorpions) and are not applicable to Squilla.
- **Trachea**: This respiratory system is characteristic of insects, which belong to a different class (Insecta).
- **Book gills**: These are found in some other crustaceans, such as horseshoe crabs, but are not the primary respiratory organs for Squilla.

5. **Select the Correct Answer**: The correct answer is **C) Gills**. Squilla uses gills for respiration, allowing it to extract oxygen from the water and expel carbon dioxide.

**Final Answer**: In Squilla, respiration occurs through **gills**.

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