Aug 15, 2014 - Cuttlefish are marine animals of the order Sepiida. Cuttlefish have an internal shell, called the cuttlebone. The classes Gastropoda Bivalvia and Cephalopoda belong to the phylum Mollusca from BIOLOGY 101A at City College of San Francisco Cephalopod definition, any mollusk of the class Cephalopoda, having tentacles attached to the head, including the cuttlefish, squid, and octopus. Apr 17, 2012 - Cuttlefish recognise prey before they have hatched, the first known embryos to show such an ability. Mollusks Class Cephalopoda DRAFT. Some have no shell, such as the nautilus, squids, and octopi. The Cephalopoda receive their name from having organs of prehension and locomotion attached to the head, an arrangement toward which a gradual approach may be traced in the highest gasteropod mollusks. They eat small mollusks including other cuttlefish, crabs, shrimp, and fish. The class is made up of the snails, which have a shell into which the animal can withdraw, and the slugs, which are snails whose shells have … These are ancient species that are found in all of the world's oceans, and are thought to have originated about 500 million years ago. Cuttlefish are marine animals that belong to the class Cephalopoda. 2 Squids belong to the Class Cephalopoda. They belong to the class Cephalopoda, which also includes squid, octopuses, and nautiluses. Some mollusks, like tusk shells and bivalves, possess clusters of neurons (called ganglions) rather than true brains, while the brains of more advanced mollusks like cephalopods and gastropods are wrapped around their esophagi rather than isolated in hard skulls. Even more weirdly, most of the neurons of an octopus are located not in its brains, but in its arms, which can function … Their foot is characterized by being long and flat. Mollusks. Play. These mollusks have a distinct head and, usually, at least one pair of tentacles (sometimes two pairs). Solo Practice. These highly intelligent mollusks have prominent eyes remarkably similar in structure to those of vertebrates. The arms, tentacles, and funnel are all derivatives of the foot. Cephalopod, any member of the class Cephalopoda of the phylum Mollusca, a small group of highly advanced and organized, exclusively marine animals. Despite their name, cuttlefish are not fish but mollusks. On the right is the relatively common Question 6 5 out of 5 points The classes Gastropoda, Bivalvia, and Cephalopoda belong to the phylum Mollusca. This quiz is incomplete! They include some of the most intelligent creatures on the planet. Many, like octopus and squid have sharp jaws. Mollusks can be segregated into seven classes: Aplacophora, Monoplacophora, Polyplacophora, Bivalvia, Gastropoda, Cephalopoda, and Scaphopoda. Reproduction/Life Cycle. This class contains the cephalopods cephalopod, member of the class Cephalopoda, the most highly organized group of mollusks (phylum Mollusca), and including the squids, octopuses, cuttlefish, and nautiluses. The proportion of undescribed species is very high. To this class belong the Nautili, Squids, Cuttle-fish, etc. (by Prefixes, Suffixes, Root Words) 1. Mollusks are a Phylum Mollusca. Cephalopods are characterized by a completely merged head and foot, with a ring of arms and/or tentacles surrounding the head. Cephalopoda means "head foot" and this group has the most complex brain of any invertebrate. … Their shells are chambered and may be straight or spiral. The main examples of this kind of mollusks include slugs and snails. Cephalopods include shelled and reduced-shell groups. Live Game Live. The Cephalopoda are named such because they have a prominent head that bears long flexible feet. 4. Like squid, octopus, and nautiluses, they belong to the Cephalopoda class. 1 Clams belong to the Class Bivalvia . Bivalves, like clams and oysters, are filter feeders and use a siphon to move water into the body. Class Cephalopoda (“head foot” animals), include octopi, squids, cuttlefish, and nautilus. Top Answer. Class Cephalopoda. 5. Answer. All animals in this class are carnivorous predators and have beak-like jaws at the anterior end. The only cephalopods you are likely to see in the rocky intertidal zone are octopi. Finally, the fourth class of mollusks is the one known as Cephalopoda. Which of the following mollusks belong to the class Gastropoda. Edit. 0 1 2. Recent studies indicate that cuttlefish are among the most intelligent invertebrates, with one of the largest brain-to-body size ratios of all invertebrates. The shell of these creatures is often what is recovered in a fossil dig. Pelecypoda (Bivalves) 3. Look it up now! Gastropod, any member of more than 65,000 animal species belonging to the class Gastropoda, the largest group in the phylum Mollusca. Delete Quiz. 6. Class Cephalopoda (Upper Cambrian to Recent) Cephalopods have a head with eyes. Answer Selected Answer: a. The Class Gastropoda includes the groups pertaining to snails and slugs. pod (sĕf′ə-lə-pŏd′) n. Any of various carnivorous marine mollusks of the class Cephalopoda, having a large head, a mouth with a chitinous beak surrounded by arms or tentacles, and in most species, an ink sac containing a dark fluid used for defense, and including the octopuses, squids, cuttlefishes, and nautiluses. The number of fossil species is estimated between 60,000 and 100,000 additional species. Print; Share; Edit; Delete; Host a game. Question: To Which Phylum Do Animals In Seashells Belong To? It is a cephalopod, the octopus; therefore, Cephalopoda would be its class. Despite their name, cuttlefish are not fish but mollusks. Many mollusks feed with a radula, to which hundreds of tiny teeth are attached. Cephalopods are a class of shell-bearing animals as well as mollusks with a reduced shell. The intrusion of a foreign object between the mantle and shell surfaces cause certain Bivalvia (Pelecypods) to form pearls . Save. 0% average accuracy. They display vivid coloration, typically seen in squids and octopuses, which is used for camouflage. They have large W shaped eyes, eight arms and two tentacles furnished with suckers, with which they secure their prey. 2014-11-23 04:14:46 2014-11-23 04:14:46. 12 minutes ago. What Do Each Of These Classes Of Mollusks Means? 0. Cephalopods are mollusks (Cephalopoda), a class which includes octopuses, squid, cuttlefish, and nautilus. Cephalopoda is the most morphologically and behaviorally complex class in phylum Mollusca. To play this quiz, please finish editing it. Gastropoda 2. Wiki User Answered . All mollusks reproduce sexually. The most common mollusk belongs to the class gastropod. The largest number of species of mollusks are in the class Gastropoda, which includes snails with a coiled shell, and others lacking a shell. 0. Class Cephalopoda The Class Cephalopoda includes mollusks that are active marine predators such as octopus, squid, and chambered nautilus. by enloescience. These classes are distinguished by, among other criteria, the presence and types of shells they possess. Class Aplacophora includes worm-like animals with no shell and a rudimentary body structure. The octopus, squid, cuttlefish, and chambered nautilus are familiar representatives. 6th - 12th grade . Mollusks are herbivores, carnivores, filter feeders, detritovores, or parasites. Cuttlefish have a unique internal shell, the cuttlebone. The octopus belongs to the phylum, Mollusca. Recent studies indicate that cuttlefish are among the most intelligent invertebrates, with one of the largest brain-to-body size ratios of all invertebrates. This class includes the extinct ammonites and nautiloids. The next largest group are the bivalves (class Bivalvia), the chitons (class Amphineura), and octopus and squid, (class Cephalopoda). … “Cephalopoda is a class of mollusks, the highest in organization of the division of the animal kingdom. Despite their name, cuttlefish are not fish but mollusks. Learn more about cephalopods in this article. The class Cephalopoda (“head foot” animals) includes octopuses, squids, cuttlefish, and nautilus. Asked by Wiki User. The Cephalopoda Squids, octopuses, nautilus, and ammonites No. Gills of clams collect food as well as O2 . Played 0 times. Gastropods are by far the largest class of molluscs, comprising over 80% of all molluscs. What class do Mollusk belong to? 3 The scars in the clam shell are from muscles. They are also the most advanced class of the mollusks. Cephalopoda … Cuttlefish are marine animals that belong to the class Cephalopoda. Mollusks definition at Dictionary.com, a free online dictionary with pronunciation, synonyms and translation. Homework. Share practice link. Practice. It shares this phylum with its brethren squid and mollusks. Finish Editing. Mollusca is the second-largest phylum of invertebrate animals after the Arthropoda.The members are known as molluscs or mollusks (/ ˈ m ɒ l ə s k /).Around 85,000 extant species of molluscs are recognized. Edit. They display vivid coloration, typically seen in squids and octopi, which is used for camouflage. The majority of gastropods have a single, usually spirally, coiled shell into which the body can be withdrawn. This quiz is incomplete! See more.
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