OESOPHAGUS STOMACH
ECHINODERMS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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are controlled by molecules within the egg.
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form the “first mouth.”
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fall into four different categories.
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are identical.
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Detailed explanation-1: -Enterocoelom is a type of true coelom. Echinoderms and chordates have Enterocoelom.
Detailed explanation-2: -Echinoderms possess a water-based circulatory system. The madreporite is the point of entry and exit for water for the water vascular system. The characteristic features of Chordata are a notochord, a dorsal hollow nerve cord, pharyngeal slits, and a post-anal tail.
Detailed explanation-3: -Usually, chordates are bilaterally symmetric while echinoderms are pentaradially symmetric. Both animal groups have internal skeletons, but the one in chordates is complete and very sophisticated, whereas the echinoderms have calcified plates. Nervous system is highly developed in the chordates than in echinoderms.
Detailed explanation-4: -Balanoglossus is a marine organism that shows the relationship between echinoderms and chordates.