| Organisms | Characteristics |
|---|---|
| $(a)$ Platyhelminthes | $(i)$ Cylindrical body with no segmentation |
| $(b)$ Echinoderms | $(ii)$ Warm-blooded animals with direct development |
| $(c)$ Hemichordates | $(iii)$ Bilateral symmetry with incomplete digestive system |
| $(d)$ Aves | $(iv)$ Radial symmetry with indirect development |
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| Level of Organization | Phylum |
| $(1)$ Tissue level | $(a)$ Platyhelminthes |
| $(2)$ Organ level | $(b)$ Porifera |
| $(3)$ Organ system level | $(c)$ Coelenterata |
| $(4)$ Cellular level | $(d)$ Arthropoda |
| Column $I$ | Column $II$ |
|---|---|
| $A$. Organ level | $p$. Pheretima |
| $B$. Cellular aggregate level | $q$. Fasciola |
| $C$. Tissue level | $r$. Spongilla |
| $D$. Organ system level | $s$. Obelia |
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