Steps which are classify the specimen are:

(i) Classify level of organization- Classify the arrangement of cells in cellular and tissue level of organization.

(ii) Symmetry-Classify the organism like as radial or bilateral symmetry.

(iii) Classify into Diploblastic or triploblastic organization

(iv) there is Presence or absence of body cavity

(v) coelom development

(vi) Classify segmentation of organism

(vii) Differentiate the presence or absence of notochord in organism.