The shape of teeth is much more significant than the position, which is generally quite similar; teeth are in the mouth (sharks also have tooth-like structures in their skin, called dermal denticles). And tooth characteristics are only one of many anatomical features by which mammals are classified.
No, ostriches aren't mammals because they don't have fur like animals and and they don't have teeth like mammals do. They do not nurse their young, as mammals do. Ostriches, though they don't fly, are classified as birds
bats have a little bit of fur and not feathers. anything with fur is a mammal
They are classified as mammals.
Starfish are echinodorms, they are not mammals and do not have teeth.
Whales have tiny hairs on their backs, and mammals have to have hair to be classified as mammals, and fish CAN NOT have hair.
Mollusks are not classified as mammals.
Egg laying mammals are classified as monotremes. They belong to the order monotremata.
no, mammals are not the only ones with teeth, there is also alligators and crocs, sharks, dolphins, some fish.Another way to read the question is - do mammals have teeth only?The answer is no - some mammals have just a long, sticky tongue for catching ants and termites. Echidnas, for example, do not have teeth. Some mammals such as the platypus have grinding plates instead of teeth.
mammals
They are, but they are classified as mammals. Humans are mammals, too.
Yes, bats are mammals.
The octopus is not classified as a mammal. They are cephalopods.