in meaning without
The prefix of "invertebrate" is "in-" which means "not" or "without," indicating that invertebrates do not have a backbone or spinal column.
invertebrate - has exoskeleton
The prefix "arth" generally signifies "joint" or "jointed" when used in words. It often relates to parts of the body that are connected or articulated, such as in the words arthritis (inflammation of the joints) or arthropod (invertebrate animal with jointed limbs).
An invertebrate.
seriously? wow....... did you pass 4th grade? invertebrate
A bullfrog is not an invertebrate; it has a spine.
The octopus is an invertebrate... It has no skeleton.
no
It is an invertebrate 
Crabs are invertebrate!Say the yeti crab has no backbone or spine so it is an invertebrate! Not vertebrate.Yes, all crabs are invertebrates, having an external skeleton (exoskeleton).
An invertebrate doesnt have a backbone. A vertebrate has a backbone.
invertebrate