Which of the following organisms is a vertebrate?

An animal of a large group distinguished by the possession of a backbone or spinal column, including mammals, birds, reptiles, amphibians, and fishes.

A vertebrate is an animal that are a backbone, which affects its body shape.

For example: we humans are vertebrates, so are cats, dogs, chimps, elephants, etc ...

While worms are not for example

Having a backbone or spinal column.

Viper1

Humans

Is an earthworm a vertebrate?

No it is not as it does not have any back bone. It is classified asNematodes Vertebrates are members of the subphylum Vertebrata, which containschordates (animals with vertebrates) with backbones or spinalcolumns. No, earthworms don't have an internal skeleton - therefore they are invertebrates.