Unformatted text preview: energy, such as light from the sun. Contrary to heterotrophs, autotrophs are producers in the food chain and can carry out photosynthesis. It would have been easy for autotrophs to reproduce and thrive in a neutral atmosphere since they don’t require an external source of substrates for growth. I believe it is highly unlikely that a “primordial soup” appeared containing all of the essential compounds for heterotrophs to evolve. It seems much more likely that autotrophs arose first and created the organic-rich compound of the “primordial soup”. Although neither of these hypothesis have been proven correct (or wrong), I believe the first life was autotrophic because of the simpler method to gathering ingredients for producing organic compounds....
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This note was uploaded on 05/23/2008 for the course BIS 2A taught by Professor Grossberg during the Winter '08 term at UC Davis.
- Winter '08