Grains are seeds of grasses. They, along with the Kentucky bluegrass and rye grass in your lawn, are plants from the family Poaceae, the grasses of the earth. Grasses are so ubiquitous and prolific that creatures have evolved that are able to survive by consuming them as their main source of food. Ruminants such as cows, goats, sheep, giraffes, gazelle, and antelopes are able to digest grasses because they have undergone extensive evolutionary adaptation over millions of years that allow them to subsist on grasses as a food supply. For instance, ruminants: Grow teeth continuously to compensate for the wear caused by sand-like particles, or phytoliths, in grass blades. They also lack upper incisors, replaced by a bony dental pad on the top of the mouth to help seize hold of grasses. I...
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