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Question : List thre similarities and dissimilarities between hemichordates and chordates.

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Answer :Similarities
1 PRESENCE of notochord
2 Presene of gill SLITS
3 Presence of dorsal hollow nerve cord
Dissimilarities
1. Gill slits ar dorsa in POSITION in HEMICHORDATES but lateral in position in chordanates .
2. Unlikethat ofb chrodates, notochods in hemichordates in short, ventral to the vessel, UNCOVERED shethas ans is called stomochord.
3 In hemichordates, dorsal hollow nerve cord is confined to the collar region only


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