Question

Respiration in ascidian occurs through

• A. General body surface
• B. Pharyngeal wall
• C. Spiracles
• D. All of the above

Answer 1

The correct option is D All of the above

Gas exchange in tunicates or ascidians occurs across the gill and also across various other body surfaces, such as the lining of the atrium. They have extensive respiratory surfaces and do not possess any special respiratory pigment. Hence ascidians respire through body, gills and spiracles.

So, the correct answer is option D.