Evidence from miller and urey's experiments suggest that complex organic molecules could be formed from other, simpler molecules. why is it unlikely that this process is still occurring today?

The Miller and Urey experiment was conducted to identify the development of life from chemical molecules that were expected to be existing on mother earth. They used an air tight chamber containing gases like methane. hydrogen, ammonia, carbon dioxide supposed to be existed on reducing environment. These gases were exposed with the electric current for a period of one week. After one week a substance with brownish tinge appeared on the walls of the chamber. This substance was aminoacid. It was concluded that the aminoacid was the source of synthesis of genome of the living organisms might have developed by the reducing gases and compounds present in the early earth atmosphere.

This is unlikely that this process still occur today because the present earth atmosphere consists of oxygen which can support the life of existing organisms it is not reducing and hot as compared to early earth atmosphere.  

b c a d mark me

4.) metal

"-the movement of carbon from the nonliving environment into living things and back to the environment

-carbon is the essential component of proteins, fats, and carbohydrates (which make up all organisms)

-carbon exists in air, water, and living organisms

-producers convert carbon dioxide in the atmosphere into carbohydrates during photosynthesis

-bacteria in the atmosphere cycles through the system in filtration units

-in cellular respiration, carbon is released back into the atmosphere as carbon dioxide

-some carbon is stored in limestone (forming one of the largest "carbon sinks" on earth)

-largest carbon reservoir on earth= limestone

-carbon stored in the bodies of organisms as fat, oils, or other molecules may be released into the soil or air when the organism dies

-this may form deposits of coal, oil, or natural gas (fossil fuels, which increased the atmospheric carbon dioxide)

-fossil fuels store carbon left over from bodies of organisms that died millions of years ago

-they are located in the surface of earth, deep within the earth and beneath the ocean floor."