an invertebrate is a animal that does not have a backbone or a back column. for example a jellyfish is an invertibrate.
Yes, it is an exact science.
to conduct secret research
earth science
invertebrate - has exoskeleton
sodium is what im looking for now shut up
to answer qustions that inclue science like "what causes mountains to form
An invertebrate.
John Dalton contributed to scienece, in chemistry and physics !!
no
It is an invertebrate 
A bullfrog is not an invertebrate; it has a spine.
The octopus is an invertebrate... It has no skeleton.