and if all life evolved from bacterias, they should be gone too?
It's not like this.
it's like moving. Your mother,father,neighbours and so on stay where they currently live, but you move to another maybe better location and start your own house,children,life.
Now you get on the land and they still live in the water as you before.
They live and you live but you find yourself in better world and you have better opportunities that your parents don't have in water.
You are evolution now.
Another good proof of evolution are ours teeth's. Ever thought why you have wisdom teeth's? You don't chew with them. But your ancestors did! Now we have jams and preserves. They had rock solid bread
