What is the difference between gastropods bivalves and cephalopods?

What is the difference between gastropods bivalves and cephalopods?

bivalve: Class of mollusks that use their foot to attach themselves to rocks or to burrow into mud, i.e. clams. cephalopod: Class of mollusks characterized by a set of arms or tentacles; i.e. octopus. gastropod: Class of mollusks that use their foot to crawl, i.e. snails.

What is the major difference between classes Gastropoda and Bivalvia?

Comparing Bivalves and Gastropods Students should explain the following: Seashells are made by animals called mollusks. Bivalve shells are made of two pieces connected at a hinge. So, if you find a shell with a hinge, it must be a bivalve. Gastropods are one piece and usually have a spiral on the end.

Do cephalopods go through larval stages?

The nervous system of mollusks varies greatly depending on the particular class, but it is generally more complex than those of roundworms or flatworms. Cephalopods have the most complicated nervous system found in invertebrates. The mollusk life cycle includes one or more juvenile, larval stages.

What is the difference between gastropods and mollusks?

Gastropoda. Gastropods make up the largest class of mollusks, and they include both snails and slugs. They make up more than 80% of all living mollusk species and are the only mollusk class that has terrestrial species. Gastropods, such as snails, have a single shell that is often coiled.

What are the principal differences between gastropods and cephalopods that can be used to distinguish these two classes of Mollusca?

Cephalopods and gastropods are two groups of molluscs. Cephalopods are found only in marine water. The majority of gastropods are terrestrial, while few are marine and freshwater animals. Cephalopods are the most intelligent vertebrates, and they move fast in the water.

How are cephalopod molluscs different than other molluscs?

The most obvious difference between most cephalopods and other mollusks is the apparent lack of a shell. They are also the only cephalopods with four gills instead of two.) Cephalopods have a more developed nervous system than other mollusks. They also have very well developed eyesight that is used in finding prey.

What do gastropods bivalves and cephalopods have in common?

As diverse as this phylum is, all its animals include three physical traits. They have what is referred to as the visceral mass, mantle and foot. The Mollusk visceral mass includes body organs – the digestive tract, renal and reproductive organs.

How are bivalves different from other mollusks?

Bivalve mollusks (e.g., clams, oysters, mussels, scallops) have an external covering that is a two-part hinged shell that contains a soft-bodied invertebrate. A roughfile clam from the Flower Garden Bank National Marine Sanctuary—just one of many different bivalve mollusk species. Bivalves even make their own shells.

How do squids and octopi differ from other members of the mollusk class?

The most obvious difference between most cephalopods and other mollusks is the apparent lack of a shell. Octopuses do not have shells at all, while squids have a small internal shell. They are also the only cephalopods with four gills instead of two.)

What is the difference between a gastropod and a bivalve?

Gastropods and Bivalve belong to the same phylum, Mollusc, but different classes due to very striking differences. Symmetry: The gastropods are asymmetrical because of an embryonic event, which is called torsion: this could be followed by coiling; visceral mass is covered by a single piece, usually coiled, shell.

What are the characteristics of the phylum Mollusca?

Phylum – Mollusca (Gastropods, Bivalves, Cephalopods) As diverse as this phylum is, all its animals include three physical traits. They have what is referred to as the visceral mass, mantle and foot. The Mollusk visceral mass includes body organs – the digestive tract, renal and reproductive organs.

What are the characteristics of gastropods?

The gastropods include snails, slugs, conchs, periwinkles and sea slugs. Habitat: They are found in both salt (marine) and freshwater habitats and on land. Diet: Some gastropods are herbivores using the radula to scrape off food particles. Others are carnivores and use the radula to penetrate the shells of their prey.

Are mollusks invertebrates or vertebrates?

Mollusks are invertebrates and include octopus, squid, snails, slugs, clams, and oysters and many others. As diverse as this phylum is, all its animals include three physical traits. They have what is referred to as the visceral mass, mantle and foot.