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Origin of Life on Earth: Key Theories and Evidence by Kevin Kevin is a document available to read on EtoBox.
1. Early Earth had conditions suitable for the formation of organic molecules, such as methane, ammonia and water vapor but no free oxygen. This allowed organic molecules to build up and form more complex molecules necessary for life. 2. Two key theories for the origin of life are that essential chemicals came from meteorite impacts or formed naturally on Earth. Experiments have supported the latter by producing amino acids from simple gases. 3. Evidence from the oldest sedimentary rocks and stromatolite
- Author
- Kevin Kevin
- Language
- EN