Phylum Mollusca Quiz / Homework. This is a document on the phylum Mollusca that can be used as a quiz, as a homework assignment, or as a review for your unit test.. It consists of 53 fill in the blank questions and 4 short answer questions.
The animal can withdraw itself into the shell. Both aquatic and terrestrial species are included in this class. The aquatic species have gills while in land forms the mantle cavity is converted into lungs.