Which of the following best describes mollusks?

A. They are bilaterally symmetrical and have a soft body always covered with a shell.
B. They have radial body symmetry and a soft body always covered with a shell.
C. They have radial body symmetry and a soft body sometimes covered with a shell.
D. They are bilaterally symmetrical and have a soft body sometimes covered with a shell.


Answer: D

Biology & Microbiology

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