Now let's suppose that some of the hippos have bigger mouths. As a result, they are able to eat more food. As the bigger mouthed hippos eat all of the food, there is less for the smaller mouthed hippos. What happens? More of the bigger mouthed hippos survive to reproduc, meaning that many of the baby hippos will have big mouths. |
Over millions of years, plants and animals have evolved into many different forms. Some with big mouths, some with small mouths, some with sharp teeth, some with no teeth, eyes in the front, eyes on the side, two eyes, eight eyes, and everything in between. All of this evolution guided by the simple law of survival of the fittest. |
Let's consider another example. Instead of hippopotamuses, this time we will examine birds. Birds have a very big advantage over other lifeforms. They can fly. This ability allows them to move around quickly, as well as the ability to easily escape from predators.
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