What type of body symmetry do mollusks display?

• A. Bilateral
• B. Radial
• C. Asymmetrical
• D. Spherical

Answer: (A)

Mollusks have bilateral symmetry, meaning their left and right sides are mirror images along a single plane that runs from front to back. This layout places paired organs on opposite sides and often a distinct head region leading the way, which fits how these animals move and interact with their environment. Radial symmetry is found in creatures that interact with their surroundings from all directions, like jellyfish, where many planes of symmetry exist. Asymmetry would lack a balanced left-right organization, and spherical symmetry isn’t a practical plan for animals with a defined body axis. Therefore, bilateral symmetry best describes mollusks.