Question

With examples name (i) the three kinds of symmetry and (ii) the three grades of organisation met within the Kingdom Animalia.

Answer 1

Answer:

Refer the above mentioned attachment

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Answer 2

(i) The three kinds of symmetry:

1. Asymmetry: No division of body into equal halves. Example - Organisms belonging to phylum Porifera such as sponges.
2. Radial symmetry: If the body of organism is divided into two equal halves it is said to exhibit radial symmetry. Example - Coelenterates, ctenophore and echinoderms.
3. Bilateral symmetry: When an organism body is divided as left and right halves which are identical to each other it is called as Bilateral symmetry. Example: Annelids and Arthropods

(ii) The three grades of organization met within the Kingdom Animalia:

1. Cellular level of organization: Porifera (Sponges)  
2. Tissue level of organization: Ctenophora (Pleurobrachia and Ctenoplana)
3. Organ level of organization: Annelida (Neris, Hirudinaria)