There isn't one.
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any animal without a back bone such as lizard and bird .
Yes, birds are vertebrates as they have a back bone
No ,invertebrate means without a back bone .
An invertibrate.
because it has a back bone so it is a vertebrate
Obviously its in a back bone or vertebrae those the terms vertebrates and invertebrates which means without a back bone
animals with no back bones
Without a back-bone (spine)
a invertebrate is a animal without a back bone
Obviously its in a back bone or vertebrae those the terms vertebrates and invertebrates which means without a back bone
Octupus
Vertebrates are animals with backbones, invertebrates are animals without backbones.