Which one of the following has a bilateral symmetry in its body

June 1, 2025 by rawan239

Which one of the following has a bilateral symmetry in its body organization?

[amp_mcq option1=”Asterias” option2=”Sea anemone” option3=”Nereis” option4=”Echinus” correct=”option3″]

This question was previously asked in

UPSC CDS-1 – 2019

Download PDF Attempt Online

Nereis is a marine polychaete worm belonging to the phylum Annelida. Annelids typically exhibit bilateral symmetry, where the body can be divided into two mirror-image halves along a single sagittal plane.

Bilateral symmetry divides an organism into two symmetrical halves (left and right).

Asterias (starfish) and Echinus (sea urchin) are echinoderms, which typically exhibit radial symmetry (specifically, pentamerous radial symmetry in adults). Sea anemones belong to the phylum Cnidaria and exhibit radial symmetry.

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