to study the characteristics of non-chordates animals a earthworm b cockroach observation
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Non-chordate animals does not possess notochord. Respiration takes place through body surface, gills or trachea. They are cold blooded animals.
a) Cockroach
They have jointed legs.
Their body is bilaterally symmetrical and segmented.
They possess open circulatory system.
They are belong to phylum Arthropoda.
Earthworm
They have true body cavity.
They are bilaterally symmetrical and triploblastic.
There is extensive organ differentiation.
They are belong to phylum Annelida.
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