Phylum Mollusca

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What is Phylum Mollusca?

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A diverse group of invertebrate animals that includes snails, clams, and octopuses, characterized by a soft body, often protected by a hard shell.

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What is the mantle in Mollusca?

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A significant part of the mollusc body that secretes the shell and covers the visceral mass.

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What is the visceral mass in Mollusca?

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The central part of a mollusc's body that contains most of its internal organs.

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What is the function of the foot in Mollusca?

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A muscular structure used for locomotion and burrowing.

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What are gills in Mollusca?

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Respiratory structures used for gas exchange, typically located in the mantle cavity.

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What is the siphon in Mollusca?

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A tubular structure used for feeding and respiration, allowing water to flow in and out.

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What is the role of chromatophores in cephalopods?

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Pigment cells that allow cephalopods to change color for camouflage and communication.

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What are the four main classes of Phylum Mollusca?

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Bivalvia, Gastropoda, Cephalopoda, and Polyplacophora.

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What is the difference between Bivalvia and Gastropoda?

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Bivalvia have two shells (e.g., clams), while Gastropoda typically have a single shell or no shell (e.g., snails).

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What is the function of tentacles in cephalopods?

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Modified foot structures used for grasping prey and sensing the environment.