Final answer:
Ruminants such as cows, sheep, and goats have a dental pad instead of upper incisors or canines, which helps them to grind plant matter based on their herbivorous diet.
Step-by-step explanation:
The species that has a dental pad instead of upper incisors or upper canine teeth are ruminants such as cows, sheep, and goats. Ruminants are adapted to their herbivorous diet by having a hard, gum-like surface in their upper front mouth, called a dental pad, which aids in grinding down plant matter. This feature, along with their lower incisors, helps them to grip and tear different kinds of foods, especially tough plant materials. Instead of upper incisors, the dental pad works against the lower incisors to cut vegetation. Ruminants also have a specific set of teeth that match their diet, including molars and premolars suited for crushing and grinding, but not the cutting and tearing typically associated with incisors and canines.