Question

Secondary radial symmetry occurs in

• A. Jelly fish
• B. Echinodermata
• C. Hemichordata
• D. Cnidaria

Answer 1

Answer: (B)

Echinodermata

A) Jelly fish are Cnidarians which have radial symmetry in both larval and adult stages

B) Echinoderms have bilaterally symmetrical larvae but the adults are radially symmetrical. This is called secondary radial symmetry.

C) Hemichordates are bilaterally symmetrical.

D) Cnidarians are radially symmetrical in both larval and adult stages.

So, the correct answer is 'Echinodermata'.