The canal system in sponges develop due to which of the following?
Correct answer: D. Folding of inner walls
- A. Porous walls
- B. Gastrovascular system
- C. Reproduction
- D. Folding of inner walls
Explanation
Canal system is also known as aquiferous system. The canal system of sponges helps in food acquisition, respiratory gas exchange and also in excretion. It occurs by folding of inner walls to provide maximum surface area, as seen in the image below.
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