characteristics of phylum-hemichordata
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Hemichordata is bilaterally symmetrical and triploblastic animal.
They are exclusively marine animals.
They can be solitary or in colonies.
Hemichordata have a true body cavity or coelom.
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Most of the organisms belonging to this phylum have a modified proboscis, due to which they have got the name Acorn worms. These animals show a few chordate characteristics but are not completely chordates. Hence they have been given the name Hemichordata (Half chordates). Another notable feature of these organisms is the threefold division of the body, with the preoral lobe, collar, and a trunk. The collar bears the tentacles in a few species. The trunk has the digestive and reproductive organs
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