Distinguish between non chordates and chordates
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Chordates have Gill silts at some stage of their lives a dorsal nerve n postanail tail... All animals r not chordates. Main difference is chordates have notochord on dorsal side of body... Hope so this will help u n Mark brain list.
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some remarkable differences between chordate and non-chordate:
heart is ventrally placed in Chordates; whereas it is absent or dorsally or laterally placed in Non-chordates. Chordates can be cold or warm-blooded, while Non-chordates are cold-blooded only. Nerve cord is single, dorsal, without ganglia in Chordates and in Non-chordates it is double, ventral, and with ganglia.
heart is ventrally placed in Chordates; whereas it is absent or dorsally or laterally placed in Non-chordates. Chordates can be cold or warm-blooded, while Non-chordates are cold-blooded only. Nerve cord is single, dorsal, without ganglia in Chordates and in Non-chordates it is double, ventral, and with ganglia.
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