What are the common characteristics of the molluscs?

Answer: Characteristics of molluscs

unsegmented soft body.

most have internal or external shell.

have a mantle - a fold in the body wall that secretes the hard prtesctive shell.

muscular foot and/or tentacles.

have a radula - a toothed structure used to grate food.

two pairs of gills except in polmonate snails.

Unsegmented soft body, Most have internal or external shell, Muscular foot and/or tentacles, and two pairs of gills except in pollinate snails.