Question

Which trait is not the characteristic of Echinodermata?

• A. Water vascular system
• B. Trochophore larva
• C. Aristotle's lantern
• D. Radial and indeterminate cleavage

Answer 1

The correct option is B Trochophore larva

Echinoderms possess a water vascular system, which hydraulically operates the tube feet or feeding tentacles. Aristotle's lantern is a complex arrangement of muscles and calcareous teeth and plates forming an eversible organ in most echinoids, functioning in mastication found in echinoderms.
Echinoderms possess 5-rayed symmetry, mostly radial, sometimes bilateral and the cleavage is indeterminate.
Trochophore larva is present in annelids and molluscs. It is a free-swimming larva which has bands of cilia.
Therefore, the correct answer is option B.