Which trait is not the characteristic of echinoderms?

Aristotle's lantern

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Water vascular system

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Radial and indeterminate cleavage

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Trochophore larva

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Solution

The correct option is D Trochophore larva
A) Aristotle's lantern is present in sea urchins which belong to Echinodermata.
B) Water vascular system is a characteristic feature of all echinoderms.
C) Echinoderms undergo radial and indeterminate cleavage after fertilisation.
D) Trochophore larva is the free swimming larva of molluscs and some aquatic annelids.
So, the correct answer is 'Trochophore larva'.

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