Molluscs
Presentation
•
Biology
•
8th Grade
•
Practice Problem
•
Easy
Rocío Romero
Used 43+ times
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8 Slides • 4 Questions
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Molluscs
Molluscs are aquatic or terrestrial invertebrates with bilateral symmetry that, in most cases, have a protective shell.
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General characteristics
➜ Aquatic molluscs breathe through gills; terrestrial molluscs through lungs.
➜ They have a more or less developed nervous system
➜ They can be herbivores or carnivores. Some feed by filtration.
➜ They reproduce sexually and most of them are hermaphrodites.
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Open Ended
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Gastropods
Most gastropods have a single spiral- shaped shell.
In their mouth they have a scraper organ, called a radula, which they usse to feed themselves.
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Multiple Choice
What is the function of the radula in a snail?
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Bivalves
Most bivalves have a shell formed of two hinged valves
Their foot, in the shape of a wedge, is used to move and dig.
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Open Ended
What is the function of the foot in bivalves?
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Cephalopods
Most cephalopods have an internal shell called gladius.
They have a well-developed eyes and a set of tentacles around the mouth.
They have a mandible called a beak.
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Open Ended
Molluscs
Molluscs are aquatic or terrestrial invertebrates with bilateral symmetry that, in most cases, have a protective shell.
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