Question

The adults are radially symmetrical but larvae exhibit bilateral symmetry in

• A. Mollusca
• B. Hemichordata
• C. Echinodermata
• D. Cephalochordata

Answer 1

Answer: (C)

Echinodermata

A) Molluscan larvae are bilaterally symmetrical and adults are asymmetrical due to torsion.

B) Both larval and adult stages are bilaterally symmetrical in Hemichordata.

C) In Echinodermata, the adults are radially symmetrical but larvae are bilaterally symmetrical.

D) In Cephalochordata, both adults and larvae are bilaterally symmetrical.

So, the correct answer is 'Echinodermata'.