Siphons and gills are structures in aquatic organisms used for? by Sunday | May 15 | Biology WAEC | 0 comments A. gaseous exchange B. buoyancy C. excretion D. movement Correct Answer: Option A A. gaseous exchange Users Also Read These:The association between two organisms in which one…Which of the following factors does not affect the…Gaseous exchange occurs through the following…The study which involves the inter-relationship…The substances recycled in the soil by the…