Campbell Biology Chapter 25. | Questions with 100% correct answers | Verified

Macroevolution - The broad pattern of evolution above the species level Chemical and physical processes on early earth may have produced very simple cells through a sequence of stages - abiotic synthesis of small organic molecules joining of these small molecules into macromolecules packaging of molecules into protocells origin of self replicating molecules when did the earth form - 4.6 billion years ago what was earths early atmosphere made of? - water vapor and chemicals released by volcanic eruptions Oparin and Haldane said - earths atmosphere was a reducing environment miller and urey conducted lab experiments showing - synthesis of organic molecules in a reducing environment is possible protocells may have formed from - fluid filled vessicles with a membrane like structure the first genetic material - RNA RNA molecules that catalyze different reactions - ribozymes the fossil record is biased towards species that - existed for a long time, were abundant and widespread and hard p