Not all animals have teeth like omnivores since not all animals are omnivores. Teeth match what animals eat, and what kinds of teeth and how many of each kind are found in an animal match food types, as when herbivores have many large molars and premolars for grinding plant material.
Work Step by Step
Review the text and see that teeth have evolved to match diet. Not all animals have an omnivorous diet, so not all have a corresponding set of teeth.