Horses have large flat incisors because this is what they need to eat tough plant forage. Horses evolved over 65 million years to eat first leaves then grasses as grasslands began to emerge. The large flat incisors allow the horse to grind down the tough plants for better digestion.
The name for the humans flat back teeth are called the molars
A mixture of both. Look at humans!
flat teeth
Just about all herbivores - plant eaters - have at least some teeth that are strong and flat.Herbivores and omnivores have flat teeth in the back of their mouths called molars and premolars. These teeth are used to grind plant-based foods as an aid to digestion.
FLAT
they have flat teeth
Woodchucks have the same number of teeth as Beavers.http://en.wikipedia.org/wiki/Beaver
A creature with sharp, pointed, square, and flat teeth likely has an omnivorous diet. It can eat a variety of food items including meat, fruits, vegetables, and possibly even grains. The different tooth types suggest that the creature may be adapted to consume a range of food textures and types.
Herbivores have flat teeth that they use to eat plants. Carnivore have the pointy, sharp teeth that they use to rip up their meat. So to answer your question, herbivores have flat teeth.
If by round, you mean 'not sharp' that would be most of the vegetarian animals, such as: cows, deer and koalas. They have wider flatter teeth in order to chew plants, grass, leaves and vegetation, kind of like the molars humans have in the back of the mouth.
No
Carnivores have pointed teeth to chew through meat, but herbivores have flat teeth to chew on plants and vegetation. Humans have both pointed teeth and flat teeth, our canines and our molars.