Table of Contents
Is an octopus a cephalopod gastropod or bivalve?
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.
Are cephalopods gastropods?
Gastropods are the largest group of molluscs containing terrestrial, marine, and freshwater animals. Cephalopods include squid, octopuses, cuttlefish, and chambered nautiluses while gastropods include snails, conchs, abalones, whelks, sea slugs, and garden slugs.
Is an octopus a cephalopod?
Octopus. Octopus are the best known of the cephalopods with their charismatic personalities, intelligence, and diversity. There are about 300 different types of octopus currently known, and new types are discovered by scientists relatively often, especially in the deep sea.
Is an octopus a bivalve?
includes clams, snails, slugs, nudibranchs, squid, octopuses, tusk shells, chitons, and many others that are all generally called mollusksMollusk: A member of the phylum Mollusca; also spelled mollusc (most especially in the United Kingdom)..
Is a Nautilus a gastropod?
The nautilus is a cephalopod, not a gastropod (such as a snail) as the authors state. Both gastropods and cephalopods are invertebrate animals, but they are in different taxonomic classes.
Is a nautilus a gastropod?
Why are octopus considered cephalopod?
Cephalopod literally means ‘head foot’ and members of this group, including octopuses, cuttlefishes, squids and nautiluses, have their foot or tentacles connected to their head, not their body. Cephalopods have the most advanced nervous system of all invertebrate animals and are active hunters.
Is an octopus a cephalopod quizlet?
Cephalopods include octopuses, squid, nautiluses and cuttlefish. Sexes are separate in cephalopods.
Which animal is not a bivalve?
Paired shells have evolved independently several times among animals that are not bivalves; other animals with paired valves include certain gastropods (small sea snails in the family Juliidae), members of the phylum Brachiopoda and the minute crustaceans known as ostracods and conchostrachans.
What defines bivalve?
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. As filter feeders, bivalves gather food through their gills.