Numerous scientists have viewed life in various ways. Different perspectives on how life began have had a great impact on these views. There are two general theories about how life began. The first is called biogenesis. This view is sometimes called creationism.
Biogenesis states that life came from life.
This supports the Adam and Eve story. I believe firmly in abiogenesis. I think that it is more practical, based on all the scientific evidence, that life came about as a result of a long period of chemical evolution, as stated by Alexander Oparin's heterotroph hypothesis. Life can not be described in one specific way, after taking into account all the different forms of life on earth. In a technical sense, all forms of life may be viewed as at least slightly similar.