Question

How do cnidarians in the medusa formmove through the water?A. the gastrovascular cavity fills with water and allowsthem to floatB. their tentacles spin causing a propeller motionC. the tentacles move along the ocean floor like feetD. water is brought into the gastrovascular cavity andthen expelled which propels them forward

Answer 1

The medusas (cnidarians) is a free-swimming form organism, that is able to move through the water by rhythmic muscular constractions of the bell part (jet propulsion) of their body. Therefore, the correct alternative is the one that says: D. water is brought into the gastrovascular cavity and then expe