Respiration occurs in Balanoglossus by

Options

A. (a) gill slits
B. (b) general body surface
C. (c) book gills
D. (d) both a) and b)

Answer

**Step-by-Step Solution:**

1. **Identify the Organism**: The question asks about respiration in Balanoglossus. Balanoglossus is a genus of marine organisms that belong to the phylum Hemichordata.

2. **Understand the Respiration Process**: Respiration in Balanoglossus occurs primarily through gill slits. These structures are crucial for gas exchange.

3. **Function of Gill Slits**: The gill slits are lined with cilia that help create water currents. This allows dissolved oxygen in the water to enter the body through the gill slits.

4. **Gas Exchange**: As water passes through the gill slits, oxygen is absorbed, and carbon dioxide is expelled. This process is essential for the survival of Balanoglossus.

5. **Filter Feeding**: The gill slits also serve a dual purpose as filter feeding organs, allowing food particles to enter while preventing larger particles from entering the organism.

6. **Evaluate the Options**: The options provided are:
- A. Gill slits
- B. General body surface
- C. Book gills
- D. Both A and B

7. **Select the Correct Answer**: Since respiration occurs through gill slits, the correct answer is A. Gill slits.

**Final Answer**: A. Gill slits

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