Explain one scientific theory (other than cell-theory) of how life began.
Answer and Explanation:
Abiogenesis is a theory that explains how life on Earth began. The theory states that life began in deep-sea vents about 4 billion years ago. According to abiogenesis non-living matter gave rise to living matter. The organic compounds that were present in the ocean coupled with energy from lightning strikes ultimately led to the formation of the first cell. This cell reproduced and made more cells. The cells evolved over the course of billions of years.
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from College Biology: Help and ReviewChapter 19 / Lesson 15