Final answer:
Cows have no upper incisors; they use a dental pad and lower incisors to feed. This adaptation assists their herbivorous diet.
Step-by-step explanation:
Cows, like many other mammals, have a set of teeth that includes incisors. However, unlike humans who have upper and lower incisors, cows have an interesting dental structure. Adult cows do not have upper incisors; instead, they have a tough dental pad on their upper front jaw. They use this dental pad along with their lower incisors to grasp and cut grass.
In total, cows have zero upper incisors. This is an adaptation that helps these herbivores to efficiently feed on grasses. So, the next time you see a cow grazing in a field, you can remember this unique aspect of bovine anatomy that contributes to their feeding habits.