Question : Describe different types of Symmetry.

1.	Question : Describe different types of Symmetry.
Answer» Solution :Animals can be categorised on the basis of their symmetry: (1) Asymmetrical, (2) Radial symmetry, (3) BILATERAL symmetry (1) Asymmetrical : Sponges are mostly asymmetrical, i.e., any plane that passes through the centre does not divide them into EQUAL HALVES. (2) Radial Symmetry: When any plane passing through the central axis of the body divides the organism into two identical halves, it is called radial symmetry. Example : Coelenterates, ctenophores and echinoderms have this kind of body PLAN. (3) Bilateral Symmetry : Animals like annelids, arthropods, etc., where the body can be divided into identical left and right halves in only one plane exhibit bilateral symmetry.

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