Evolution is a broad term that is applied to different processes of change and development within an organism. It is critical to understand the different types of evolution that occur, and the significance, implications and evidence for each, in order to clarify evolutionary theory. In this discussion, the three types of evolution are defined and explained with examples, as the question is examined "Can new types of organisms arise by random mutations?

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How did life on earth start? Even the simplest cells are extremely complex. With thousands of molecules involved that have to be in just the right conformation, concentration, and sequence, just getting all the necessary parts of a cell together is an impossible feat. But even if you had all of this, the cell wouldn't be alive. What would it take for the cell to start living? What would it take to stay alive? How probable is it for this to happen by chance?

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How did life on earth start? When scientists talk about life beginning, they are referring to "simple" life forms or single-celled organisms. But how "simple" are these life forms? We know today that these cells are made of thousands of different parts. What would it take for these molecules to form naturally from elemental atoms? How likely is it for this to occur?

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