Question

In sponges, canal system develops due to

• A. Gastrovascular system
• B. Folding of inner walls
• C. Porous walls
• D. Reproduction

Answer 1

The correct option is B Folding of inner walls

Canal system in sponges develops due to folding of body wall. Three types of canal systems in sponges are ascon type, sycon type and leucon type. Leucon type of canal system is most advanced and develops by folding of body wall. Ascon type of canal system is most primitive and shows minimal folding

So, the correct answer is 'Folding of inner walls'