Botany - Animal Kingdom Question with Solution | TestHub

Types of animals on the basis of symmetry -

$1.$Asymmetrical - No particular symmetry. Examples : Most of sponges.

$2.$Radially symmetrical - When any plane passing through the central axis of the body divides the organism in 2 equal halves. Examples : Few sponges, coelenterates, ctenophores, and adult echinodermates.

$3.$Bilaterally symmetrical - Body of organism is divisible into 2 equal halves only in one plane. Examples : Platyhelminthes, aschelminthes, annelids, arthropods, molluscs, echinodermates and chordates.