Which statement is NOT true about echinoderms?

A. The exoskeleton is made of spiny plates.
B. Larvae are free-swimming and bilaterally symmetrical.
C. A water vascular system allows the tube feet to produce suction.
D. Gas exchange occurs through skin gills and tube feet.
E. Symmetry is radial in the adult, usually with parts in fives or multiples of five.


Answer: A

Biology & Microbiology

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