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Actually most animals (over 90%) lack a backbone. The animal kingdom is seperated to many phyla. Almost all of them lack a backbone and so are called "invertibrate". The proifera phyla has sponges. The cnidaria phylum has coral, sea anemones and jellyfish. The molluska phylum has snails, clams and octopus. There are several phyla for worms, such as platyhelminthes (flat worms), annelida (segmented worms) and nematoda (round worms). Most animal species belong in the arthopoda phylum, which has centipeds, millipedes, aracnids and crustaciens. One of its classes, insects, make up over half the animal species. Then the echinodermata phylum has sea urchins, sea stars and sea cucumbers. Finally there is the single cordata phylum. Some of the members lack a true spine, like lancelets and sea squirts. Others are the vertibrites, which are all the animals that do have a backbone. They include humans, other mammels, reptiles, birds, amphibians and fish. Seperating the animal kingdom to invertibrates and vertibrites is no longer very relevent to zoology.

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12y ago
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12y ago

invertabrates

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The correct spelling of the answer is invertebrates.

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Q: What are 20 animals without a backbone?
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Related questions

Do animals with a backbone out number animals without a backbone?

No, there are many more animals without backbones than there are those that have backbones.


What Animal without a backbone?

Animals without backbone are invertebrates, because vertebra means backbone.


What are facts about invertebrates?

Invertebrate animals are amimals without a backbone.


Is a man vertebrate or an invertebrate?

ALL animals that have a backbone are "vertebrates". ALL animals without a backbone are "invertebrates". Man is an animal with a backbone.


What are animal without the backbone called?

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What are the smallest animals without a backbone?

Single celled animals.


Name 5 animals with a backbone and 5 without a backbone in Singapore?

Insects are the only creatures without backbones. The rest of the other animals in other animal classification all have a backbone.


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if youre into spiders, bugs or snails they have no backbone


What is the first division in the animal kingdom?

Vertebrates and invertebrates... V = Animals with backbone IV= Animals without backbone


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Animals without shells are called invertebrates?

animals without backbones are invertebrates. octopi and squids have no shells, but are invertebrates because they contain no backbone. if they had a backbone, they'd be vertebrates.


What is the Correct term for animals that have no backbone?

Animals without an vertebral column, which would be a backbone or spine, are called Invertebrates.The "in" prefix of the word meaning "without" Therefore 'in'--without, 'vertebrate' --bone/s in the column of the spine.