1.

Phylum Mollusca can be distinguished from other invertebrates by the presence ofA. bilateral symmetry and exoskeletomB. a mantle and gillsC. shell and non-segmented bodyD. a mantle and non-segmented body

Answer» Correct Answer - D
Members of Phylum Mollusca have non-segmented body with a distinct head, muscular foot and visceral hump. A soft and spngy layer of skin forms a mantle over the visceral hump. The other characteristics mentioned in other options are shared with other phyla e.g. bilateral symmetry is exhibited by phylums Platyhelminthes, Aschelminthes, Annelida and Arthropoda.


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