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It isn't really an ancient organism, but Cyanobacteria were the organisms that changed earths atmosphere (I think?)
It was around 3 billion years ago, and they formed colonies that accreted sand making structures known as Stromatolites.
Funny thing was because there was no free Oxygen around before hand, as soon as the Cyano's started making it, it would react with all the dissolved iron in the oceans (making rust) to such proportions that they almost wiped themselves extinct because there was so much rust everywhere!
What else can I help you with?
Earths crust is mostly made of what iron oxygen or silicon?
Earth's crust is mostly made up of Silicon and Oxygen
Does the earths crust have more silicon or oxygen in it?
The Earth's crust is primarily made up of oxygen (46.6%) and silicon (27.7%), with silicon being the second most abundant element in the crust.
Most of Earths dry air is made up of whAT?
Most of Earth's dry air is made up of nitrogen (about 78%) and oxygen (about 21%). Other gases such as argon, carbon dioxide, and water vapor make up the remaining composition.
Name three elements that make up most of earths mantle?
The rocks in earths mantel are made up of 44.8% oxygen, 21.5% silicon, and 22.8% magnesium. Iron, calcium, sodium, aluminum, and potassium are also present. The elements occur in rocks as oxides.
What is the most abundant element in earths hydrosphere?
Hydrosphere is made up of water, salt and others so that why i'm giving you this.....(remember water is made up of oxygen and hydrogen,common salt is made up of sodium and chlorine)
How much of the earths atmosphere is made up of nitrogen and oxygen?
The earths atmosphere is made up of 78% nitrogen and 21% oxygen
Most of earths dry is made up of what?
nitrogen and oxygen
What is Earths dry air is made up of?
nitrogen and oxygen
Was the earths early atmosphere made up of mostly oxygen?
no
How much of earths crust is made up of oxygen and silcon?
47 % oxygen & 27% silicon.
How much is the earth atmosphere is made up of nitrogen and oxygen?
The earths atmosphere is made up of 78% nitrogen and 21% oxygen
Approximately 20 percent of the earths atmosphere is made up of which gas?
Approximately 20 percent of the Earth's atmosphere is made up of oxygen.
What is the earths atomsphere?
the earth atmosphere is made up of carbon dioxide and oxygen and some helium.
Earths crust is mostly made of what iron oxygen or silicon?
Earth's crust is mostly made up of Silicon and Oxygen
How did the addition of oxygen to earths atmosphere affect the evolution of life?
it made it possible 4 it to be plants animals and human life
The bloodstream brings oxygen and food to the cells?
The circulatory system brings oxygen and food to the cells of an organism. It is made up of the heart, a network of vessels and the blood.
What is planet Earths atmosphere made of?
79% Nitrogen, 20% Oxygen and 1% argon, Carbon Dioxide and other trace gasses.
