Phylum Chordata: Subphylum Cephalochordata and Urochordata along with the subphylum Craniata
The group of vertebrates most closely related to birds are probably the dinosaurs.
they are in invertebrate-- A bit more info --Yes, they are indeed an invertebrate, but they are the closest invertebrate phylum to vertebrates. The only ones which are closer are the group Urochordata, the cephalochordates and the hagfish (which is a craniate, not a vertebrate)We are more related to starfish and sea cucumbers than to insects...
Well its sort of confusing, see since the invertebrate group has more groups than the vertebrate than that means invertebrate would have more organisms.
Alligators are vertebrates because they have a backbone.
They come from the class of birds, but they´re not invertebrates. Invertebrate means ´without a backbone´, and birds do have a backbone (and the rest of their skeleton), making them vertebrates!
No, crocodiles are not invertebrates. Crocodiles are reptiles, which means they have a backbone and are part of the vertebrate group of animals.
Reptiles
Viper fishes are vertebrates as they have a skeletal system.
No. All echidnas are mammals, and all mammals are vertebrates. Echidnas are different from "echinoderms".
AnswerAn invertebrate. It does not have a spine.
The octopus is an invertebrate, therefore it cannot be a fish, which belong to the group of animals known as vertebrates. The octopus is a mollusc, and from the same group as squid and cuttlefish.
The group of fishes most closely related to ancestral amphibians are the lobe-finned fishes, which include the coelacanths and lungfishes. These fishes share certain characteristics with amphibians, such as limbs with digits and lungs or lung-like structures, indicating a close evolutionary relationship.