In embryology evolution has happened various times because like a monkey is born with a genetic mutation. That mutation is that the monkey does not have a tail. Later on that monkey will have others monkeys and pass on the trait and sometime over evolution that species might start a new species.
In Herbicides a person will start spraying the herbicide killer Round-Up. That person uses Round-Up to clean the weeds out of his driveway and soon some of those weeds will not be affected by the weeds so the person will eventually have to find a new type of spray like Grazeon.
i liked how you explained it clearly and you gave examples
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