No either you have a back bone or you don't
The development of the notocord.
Vertebrates have vertebra.Invertebrates don't.
I think you got the spelling wrong, and it is "Chordates(phylum Chordata) are animals which are either vertebrates or one of several closely related invertebrates."
Land and aquatic vertebrates are similar in that they both have a vertebral column. They are both either primary or secondary consumers as well. A difference is that vertebrates that live only in the water do not have fully developed hind legs.
Very much a vertebrate! It is a mammal, and all mammals are vertebrates- invertebrates are all animals that have no internal skeletal structure, but have either gained an exoskeleton (such as insects) or have no skeletal structure at all (i.e. jellyfish, etc.)
A scorpion is an Invertebrate.
Gneteicall modifies organisms are not chemical compunds and so do not belong in either the organic or inorganic categories
They will belong to either the same family or species.
yes; endoskeleton of vertebrates may be either bone or cartilage
true
A proboscis is an elongated appendage from the head of an animal, either a vertebrate or an invertebrate. In invertebrates, the term usually refers to tubular mouthparts used for feeding and sucking. In vertebrates, the term is used to describe an elongated nose or snout.
Neither those two groups only refer to animals! Vertebrates are animals with backbones, invertebrates don't have backbones.