The animal you’re describing is likely a rodent, such as a rat or mouse. Rodents have backbones, are known for their incessant gnawing habits, and many species can be quite irritating due to their tendency to invade homes and chew on wires or furniture. Their sharp teeth grow continuously, requiring them to gnaw to keep them manageable.
Earthworm does not have the back bone. Earthworm is invertebrate animal.
a verbrate is a animal with a a back bone
An invertibrate.
if it does not have a back bone
An Animal with a Backbone is called a vertebrate.
animals with no back bones
a invertebrate is a animal without a back bone
its the heel bone at the back of the tarsus
An invertebrate is an animal that does not have a back bone (spine).
Earthworm does not have the back bone. Earthworm is invertebrate animal.
an invertibret means that the animal has no back bone
Invertebrate