Why are squid considered to be mollusks?

Mollusks are invertebrates such as snails, scallops, and squids. Mollusks have a hard outer shell. There is a layer of tissue called the mantle between the shell and the body. Most mollusks have tentacles for feeding and sensing, and many have a muscular foot.

1. Is a squid classified as a mollusk?
2. How are squid related to mollusks?
3. What are squids classified as?
4. Why is octopus under Mollusca?
5. Which of these animals is mollusk?
6. What trait in the other mollusks is homologous to the pen of squid?
7. Why is an octopus classified under Mollusca and not under Arthropoda?
8. What best describes a mollusk?
9. Is a squid an amphibian?
10. Is a squid an arthropod?
11. Why do scientists classify squid as cephalopods?
12. How does an octopus eat a mollusk?
13. Is a snail a mollusk?
14. Is a jellyfish a mollusk?

Is a squid classified as a mollusk?

Cephalopods are a group of molluscs that include the pearly chambered Nautilus, squids, and the octopus.

How are squid related to mollusks?

The class cephalopoda, meaning "head-footed," includes squids, octopods, cuttlefish and nautiluses. ... The cephalopods appear to be very different from other mollusks, but physiologically they are similar. Cephalopods, like most mollusks, have a mantle, a mantle cavity, a radula, and a U-shaped digestive tract.

What are squids classified as?

cephalopod, any member of the class Cephalopoda of the phylum Mollusca, a small group of highly advanced and organized, exclusively marine animals. The octopus, squid, cuttlefish, and chambered nautilus are familiar representatives.

Why is octopus under Mollusca?

If you compare the two diagram photos, an octopus (also it's closest comrade the squid) has all it takes to be classed as a mollusc, possessing metanephridia (aka kidney), radula (in form of chitinous tooth called beak), muscular feet and most importantly, a mantle and a lack of backbone unlike a fish which has a ...

Which of these animals is mollusk?

Mollusks. The mollusk group spans over 50,000 known species. They include snails, clams, oysters, mussels, squid and octopods.

What trait in the other mollusks is homologous to the pen of squid?

The pen of the squid is considered an internalized shell, homologous with the heavily mineralized external shells of other molluscs (Naef, 1928;Young et al., 1998).

Why is an octopus classified under Mollusca and not under Arthropoda?

Answer: Octopuses can camouflage very well in their surroundings. They have ink glands that they use to defend themselves or escape from predators. They show all the characteristic features of Phylum Mollusca and are triploblastic, bilaterally symmetrical, and found in various regions of the ocean.

What best describes a mollusk?

mollusk, also spelled mollusc, any soft-bodied invertebrate of the phylum Mollusca, usually wholly or partly enclosed in a calcium carbonate shell secreted by a soft mantle covering the body.

Is a squid an amphibian?

Squid are cephalopods in the superorder Decapodiformes with elongated bodies, large eyes, eight arms and two tentacles. ... They are among the most intelligent of invertebrates, with groups of Humboldt squid having been observed hunting cooperatively.

Is a squid an arthropod?

Mollusks - Mollusks have a soft body that is covered by an outer layer called a mantle. Many mollusks live inside a shell, but not all of them. Some examples of mollusks include squid, snails, slugs, octopuses, and oysters. Crustaceans - Crustaceans are a type of arthropod, meaning that they have jointed legs.

Why do scientists classify squid as cephalopods?

Like other animals in the Mollusca phylum squid are invertebrates. Along with octopi and cuttlefish, squid are in the class Cephalopoda, but because of their three body sections they belong to their own order Teuthida, which at about 300 species is the largest group of Cephalopods.

How does an octopus eat a mollusk?

The behavior o£ the octopus when feeding upon shelled molluscs is described in four steps: selection of prey, boring a hole in the shell, secreting into the borehole, and pulling out the body oC the mollusc and eating it. ... Drilling of the hole is done by the radula.

Is a snail a mollusk?

The Class Gastropoda (in Phylum Mollusca) includes the groups pertaining to snails and slugs. The majority of gastropods have a single, usually spirally, coiled shell into which the body can be withdrawn.

Is a jellyfish a mollusk?

question_answer Answers(2)

Ans: Phylum mollusca include soft bodied animals with hard shell Eg: snails, octopus, mussels, oysters. Phylum Coelenterata contain special structure called coelenteron where the food digested.It include jelly fish and sea anemones.