Not all animals do.
Yes, mammals have more teeth that reptiles. The land mammal with the most teeth is the Giant Armadillo (Priodontes giganteus) with as many as 100 teeth. The average range for mammals however is 20-40. Reptiles rarely have many teeth, if any at all. The crocodile has the most, with around 80 teeth at a time. It replaces as many as 3000 in its lifetime, but this is over a long period of time.
Heterodont mamals have difference teeth ather than all the same teeth
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.
There are several mammals which do not have teeth. The echidna is an Australian mammal, a monotreme which only has a sticky tongue. The platypus is another Australian monotreme which has grinding plates, rather than teeth. Sloths, anteaters, tamanduas, pangolins, baleen whales, and adult monotremes are all toothless mammals.
No. Generally speaking mammals are more intelligent than non-mammals
Bats ARE mammals.
There are a variety of features but one is the number of fenestrae in the skull. Mammals also have more differentiated teeth than reptiles. Furthermore, you can look at the gait. Mammals have a parasagittal stance, while most reptiles have a sprawled stance.
mammals tend to have heat in their bodies more than their surroundings
Yes
A dog has more teeth than a cat.
12.8
yes there are more teeth fossils than skin fossils