Statement I: Lower invertebrates like sponges, coelenterates, flatworms, etc., exchange $\mathrm{O}_

Question

Statement I: Lower invertebrates like sponges, coelenterates, flatworms, etc., exchange $\mathrm{O}_{2}$ with $\mathrm{CO}_{2}$ by simple diffusion over their entire body surface.\ Statement II: Earthworms use their moist cuticle and insects have a network of tubes (tracheal tubes) to transport atmospheric air within the body.\

Professor PC Thomas Classes · Answer

(a) : Mechanism of breathing vary among different groups of animals depending mainly on their habitats and levels of organisation.