EVERYDAY SCIENCE

Detailed explanation-1: -Sponges are multicellular animals, unique in many ways. They are the only group of animals that can be classified as asymmetric, which means they possess no symmetry at all.

Detailed explanation-2: -Sponges are unsymmetrical or radially symmetrical, with many cell types but no distinct tissues; their bodies contain numerous pores and sharp protective spicules. Coelenterates (phylum Cnidaria) are radially symmetrical, with two tissue layers (ectoderm and endoderm) surrounding an all-purpose gastrovascular cavity.

Detailed explanation-3: -So, the correct answer is ‘Asymmetrical’.

Detailed explanation-4: -Sponges have no body plan and are asymmetrical.

Detailed explanation-5: -Complete answer: The spongilla is the genus of freshwater sponges present in the family Spongillidae found in the lakes and in the slow streams. The body of the sponge is cylindrical, asymmetrical, or has radial symmetry whereas leech, dolphin, and penguin have bilateral symmetrical.