| Term | Definition |
|---|
| heterotroph hypothesis | an explanation of how living things developed on primitive earth |
| A.I. Oparin | russian scientist that proposed that life began in or near the ocean. believed that organic molecules were formed from the chemical elements in Earth's primitive ocean |
| atmosphere | hydrogen, methane, ammonia,water vapor, carbon dioxide, little to no oxygen |
| ocean | hot thin soup, dissolved minerals, near boiling |
| energy | solar radiation, xrays, uv rays, cosmic rays, lightning, earths heat, radio activity in rocks |
| synhesis reactions | chemical bonds were formed among the dissolved molecules, resulting in the production of larger organic molecules, such as amino acids and sugars. these organic molecules interacted to form more complex organic molecules |
| formation of aggregates | clusters of molecules also known as coacervates. these molecules took in nutrients in the ocean as food, therefore they are known as the first heterotrophs |
| first cells | 3.5 billion years ago, similar to simplest cells we find today, bacteria |
| cells lacking membrane | prokaryotes |
| development of life | anaerobic heterotrophs-anaerobic respiration-CO2 releases-autotrophic nutrition-photosynthesis releases O2-aerobic organisms |
| complex forms | evolved from simpler unicellular forms of life |
| stanley miller and harold urey | miller built a contraption that simulated the conditions of promitive earth, produced a variety of small organic molecules that are essential to life |
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