Which term describes animals without a backbone?

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Multiple Choice

Which term describes animals without a backbone?

Explanation:
Animals are categorized by whether they have a backbone. Those with a backbone are vertebrates; those without are invertebrates. The term for animals without a backbone is invertebrates. This includes a wide range of creatures like insects, spiders, mollusks, and jellyfish. Mammals are vertebrates, so they possess backbones, which is why they aren’t described as lacking one. Cnidarians are invertebrates too, but the general term invertebrates covers all animals that don’t have a vertebral column, not just a single phylum.

Animals are categorized by whether they have a backbone. Those with a backbone are vertebrates; those without are invertebrates. The term for animals without a backbone is invertebrates. This includes a wide range of creatures like insects, spiders, mollusks, and jellyfish. Mammals are vertebrates, so they possess backbones, which is why they aren’t described as lacking one. Cnidarians are invertebrates too, but the general term invertebrates covers all animals that don’t have a vertebral column, not just a single phylum.

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