Botany - Animal Kingdom Question with Solution | TestHub

Types of animals on the basis of symmetry -

A. Asymmetrical - No particular symmetry. Examples - Most of the sponges

B. Radially symmetrical - When any plane passing through the central axis of the body divides the organism into 2 equal halves. Examples - Few sponges, coelenterates, ctenophores and adult echinoderms.

C. Bilaterally symmetrical - If the body of an organism is divisible into 2 equal halves only in one plane. Examples - Platyhelminthes, aschelminthes, annelids, arthropods, molluscs, the larva of echinoderms and chordates.