found on every continent on Earth.
2 Rodents are a major mammal group that includes mice, rats, squirrels, beavers, and many others. Rodents are adapted for a vegetable-based diet. They have strong, sharp incisors in the fronts of their mouths. The incisors act like
chisels, and they can cut through plant matter much like a razor cuts through hair. The sharp incisors of mice, rats, and squirrels enable them to bite through the tough shells that cover seeds and nuts. The incisors of a beaver are especially large and strong, an adaptation that enables these animals to chew wood for building dams and dens.