The disadvantages of shell present on the body of mollusk. Concept introduction: Mollusks are the group of organism which is characterized by bilateral symmetry and three germ layers. Mollusks have soft and unsegmented bodies. Most species of mollusk acquirea calcareous exoskeleton which support and protects the soft body parts of the animal. Snail, sea slug, oyster and octopus are some examples of mollusks.

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Chapter 21.5, Problem 4MC

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The disadvantages of shell present on the body of mollusk.

Concept introduction:

Mollusks are the group of organism which is characterized by bilateral symmetry and three germ layers. Mollusks have soft and unsegmented bodies. Most species of mollusk acquirea calcareous exoskeleton which support and protects the soft body parts of the animal. Snail, sea slug, oyster and octopus are some examples of mollusks.

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