Is a worm a mollusk?

Mollusks are invertebrates such as the common snail. Most mollusks have shells. Annelids are worms such as the familiar earthworm. ... Annelids look like roundworms on the outside, but on the inside they are more like mollusks.

1. What is considered a mollusk?
2. What category is a worm?
3. How are worms and mollusks similar?
4. Is an insect a mollusk?
5. Is a slug a mollusk?
6. Which is not a mollusk?
7. Is a worm an amphibian?
8. Is a worm a mammal?
9. Is a worm an arthropod?
10. Is a worm an echinoderm?
11. Do mollusks have appendages?
12. Is a leech a mollusk?
13. Is an octopus a mollusk?
14. Is a millipede an insect?
15. Is a Butterfly an arthropod?

What is considered a mollusk?

Definition of mollusk

: any of a large phylum (Mollusca) of invertebrate animals (such as snails, clams, or squids) with a soft unsegmented body usually enclosed in a calcareous shell broadly : shellfish.

What category is a worm?

Worms are members of several invertebrate phyla, including Platyhelminthes (flatworms), Annelida (segmented worms), Nemertea (ribbon worms), Nematoda (roundworms, pinworms, etc.), Sipuncula (peanutworms), Echiura (spoonworms), Acanthocephala (spiny-headed worms), Pogonophora (beardworms), and Chaetognatha (arrowworms).

How are worms and mollusks similar?

Similarities between mollusks and segmented worms suggest that they could have a common ancestor. These groups were the first animals to have a body cavity with space for body organs to develop and function. Mollusks and segmented worms have a one-way digestive system with a sepa- rate mouth and anus.

Is an insect a mollusk?

insect, (class Insecta or Hexapoda), any member of the largest class of the phylum Arthropoda, which is itself the largest of the animal phyla. ... mollusk, 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 slug a mollusk?

slug, any mollusk of the class Gastropoda in which the shell is reduced to an internal plate or a series of granules or is completely absent. The term generally refers to a land snail. ... Marine gastropods of the subclass Opisthobranchia are sometimes called sea slugs (see opisthobranch).

Which is not a mollusk?

Technically, squids and octopi are cephalopod mollusks, though they don't have shells. You can be allergic to crustaceans but not mollusks, and you can be allergic to mollusks but not crustaceans.

Is a worm an amphibian?

Worms are neither insects nor amphibians; they are annelids.

Is a worm a mammal?

Yes, worms are animals. Worms are divided into three groups: the flatworm, the roundworm, and the segmented worm. Flatworms are soft, unsegmented invertebrates. They do not have specialised respiratory systems so it restricts them to this flat shape to allow them to breathe.

Is a worm an arthropod?

They are called arthropods because they have articulated legs in the adult state (arthropod means “articulated foot”). ... Other tiny animals are not arthropods. Earthworms have bodies composed of many segments, but have no legs. They belong to the phylum Annelidae.

Is a worm an echinoderm?

WoRMS - World Register of Marine Species - Echinodermata.

Do mollusks have appendages?

Most mollusks have a scraping feeding appendage known as a radula and an organ at the top of their bodies called a mantle. What is the function of a slug?

Is a leech a mollusk?

Despite their similar body forms, they are different from each other. Leeches are related to earthworms; most of them feed on the blood of other creatures. They have been used in clinical bloodletting for centuries. Slugs are mollusks -- they're basically snails without shells.

Is an octopus a mollusk?

octopus, plural octopuses or octopi, in general, any eight-armed cephalopod (octopod) mollusk of the order Octopoda. The true octopuses are members of the genus Octopus, a large group of widely distributed shallow-water cephalopods.

Is a millipede an insect?

Although they resemble insects, centipedes and millipedes both are classified as arthropods. ... Insects have three pair of legs but centipedes have one pair of legs on each body segment. Millipedes have two pair of legs per body segment.

Is a Butterfly an arthropod?

Arthropods are a motley crew: cockroaches, crabs, butterflies, beetles, centipedes, scorpions, shrimp, spiders, lobsters, lice, ticks, termites, potato bugs, and sea monkeys (a.k.a., brine shrimp) — they're all examples of arthropods.