EVERYDAY SCIENCE

Detailed explanation-1: -Summary. Cnidarians have radial symmetry and true tissues.

Detailed explanation-2: -These tissues develop from two germ layers-ectoderm and endoderm. Cnidarians are radially symmetric animals (e.g. sea anemones).

Detailed explanation-3: -Cnidarians have radial symmetry. Echinoderms are bilateral animals that have a 5-part radial symmetry as adults.

Detailed explanation-4: -Cnidarians are radially or biradially symmetric, a general type of symmetry believed primitive for eumetazoans. They have achieved the tissue level of organization, in which some similar cells are associated into groups or aggregations called tissues, but true organs do not occur.