Domestic dogs have been selectively bred for millennia for various behaviors, sensory capabilities, and physical attributes. Modern dog breeds show more variation in size, appearance, and behavior than any other domestic animal. Dogs are predators and scavengers, and like many other predatory mammals, the dog has powerful muscles, fused wrist bones, a cardiovascular system that supports both sprinting and endurance, and teeth for catching and tearing. COUNT 7
QSN1 What species shows more difference in size, looks and actions than any other? ANS1 Modern dog breeds QSN2 What are dog teeth best suited for? ANS2 catching and tearing. QSN3 Dogs are considered to be predators and what else? ANS3 scavengers QSN4 What bones in dog legs are fused? ANS4 wrist QSN5 A dog's heart and vascular ability if best suited for sprinting and what else? ANS5 endurance QSN6 What are a dog's teeth mainly used for? ANS6 catching and tearing QSN7 Dogs originated as predators and what? ANS7 scavengers