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प्रश्न
Hemichordates have now been placed with the non-chordates close to echinoderms, because :
विकल्प
Notochord is absent
Pharyngeal gill - slits are lacking
Dorsal nerve cord is absent
Heart is lacking
MCQ
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उत्तर
Hemichordates have now been placed with the non-chordates close to echinoderms, because : Notochord is absent
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