The three parts of molluscan body plan. Introduction: The phylum Mollusca forms the second large group among invertebrates. They are mostly marine and have soft body that is preserved by a hard shell. An important luxury good, the pearl, produced from pearl oysters that belong to the phylum Mollusca.

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Chapter 33, Problem 4IQ

a.

Summary Introduction

To describe: The three parts of molluscan body plan.

Introduction: The phylum Mollusca forms the second large group among invertebrates. They are mostly marine and have soft body that is preserved by a hard shell. An important luxury good, the pearl, produced from pearl oysters that belong to the phylum Mollusca.

b.

Summary Introduction

To compare: The feeding behaviors and activity levels of snails, clams, and squid.

Introduction: Snails, clams, and squid belong to the phylum Mollusca. They lack segmentation and have a soft body. They lack typical legs but have muscular foot for locomotion. Some have flexible tentacles that are helpful in sensing the environment.

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