You need to specify a time period for the question to be answered. Synapsids, therapsids, and cynodonts could all be called the early ancestors of mammals, but each at a different stage in the evolutionary history of mammals.
reptiles
Polar bears are vertebrate mammals.
they are a vertebrate because their are mammals, and and all mammals are vertebrate because they have internal skeletons with a backbone.
No. There are no amphibians that are mammals. Amphibians are the frogs, toads, salamanders and newts plus their kind. And none of them are mammals. Not all vertebrates are mammals, though all mammals are vertebrates. Vertebrates have backbones, and apes and whales are mammals and are vertebrates. But there are many vertebrates that are not mammals. Fish are vertebrates, and they are not mammals.
no crabs aren't vertebrate it is a Crustacean.
Mammals and birds both do well in the tundra. Fish, reptiles and amphibians--not so much. The best answer would probably be 'warm blooded'.
Not at all. Cats and dogs are both mammals, and both make good pets, but they are very different physiologically and descend from different branches of the evolutionary tree.
a vertebrate is any animal with a back bone - even we are vertebrates. so a vertebrate could live in any kind of location, all over the world. i think all mammals are vertebrates (dogs, cats, rabbits, elephants, lions, anything) but things like insects and worms are not vertabrates. hope i helped! :)
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Its not.
A dragonfly is not a vertebrate at all. Dragonflies are insects which are classified as invertebrates.
Gabriel Barajas is in Mr. McKinney's 1st period class and has a friend named Pedro Dominguez.