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The first oxygen on earth was produced by a blue green bacteria called cyanobacteria. They had no used for it, it was just waste in their process of making glucose as food using sunlight (the glucose was then fermented when the energy was needed). The waste oxygen poisoned many life forms. Eventually some life forms evolved that could use oxygen and also protected themselves from its poisonous character.
What else can I help you with?
Where does the oxygen come from that you are breathing right now?
oxygen can be formed by the electrolysis of water, or by chemical reactions Oxygen is present in air, about 19% by volume, but it is not formed there. Most oxygen is naturally formed in green plants and algea by photosynthesis.
Is rain water a ionised water?
Yes, it is ionised as after ionisation of hydrogen and oxygen only water is formed.
Do any plants produce as much carbon dioxide as humans?
No, it's the other way around. Plants intake Carbon dioxide and put out Oxygen. In the theory of how the world formed, this is how the atmosphere got to contain Oxygen, from plants spreading over the continents and producing Oxygen.
Why are cupcakes water teeth and oxygen not minerals?
A mineral is a solid with a crystalline structure that is made by geological processes. Water and oxygen would not fit under that category because they do not have a crystalline structure, and made from the earth. A cupcake may actually contain minerals in it, but a cupcake wouldn't count because it is a man-made food that doesn't originate in the earth. Teeth are made from calcium, a mineral, but teeth themselves are not made from the earth, they are made by body functions.
What is Earth Gas?
earth gases are that naturaly formed on earth eg. oxygen and the one in are gas boilers that people pump out of the ground is methane.
What is the compound formed by tin and oxygen?
The compound formed by tin and oxygen is tin oxide.
What are formed when non metals combine with oxygen?
Oxides are formed when nonmetals combine with oxygen.
What gas is formed by a discharge from oxygen?
Oxygen formed on earth by compound of nuclear fission of sun with helium and hydrogen.
Is oxygen formed by polar covalent bonds?
No, oxygen is not formed by polar covalent bonds. Oxygen is an element found in nature, and its molecules are formed by nonpolar covalent bonds between two oxygen atoms.
How is oxygen formed in a car engine?
Oxygen and petrol or diesel is burned in a car engine, it is not formed
What is the oxygen formed during photosynthesis called?
Oxygen formed during photosynthesis is the gas O2.
How are individual atoms of oxygen formed in the stratosphere a. Individual oxygen atoms are formed when oxygen molecules collide with each other. b. Individual oxygen atoms are formed in the sun. c.?
a. Individual oxygen atoms are formed when oxygen molecules are broken apart by high-energy radiation, such as ultraviolet light, in the stratosphere. This process is known as photodissociation.
What is the gas formed by adding a third oxygen atom to an oxygen molecule?
Ozone is the gas formed by adding a third oxygen atom to an oxygen molecule (O2).
Where does the oxygen come from that you are breathing right now?
oxygen can be formed by the electrolysis of water, or by chemical reactions Oxygen is present in air, about 19% by volume, but it is not formed there. Most oxygen is naturally formed in green plants and algea by photosynthesis.
What is the compound formed by monoxide and oxygen?
The compound formed by monoxide and oxygen is dioxide. For example, carbon monoxide combines with oxygen to form carbon dioxide.
Name the compound that is formed when calcium and oxygen react together?
Calcium oxide is formed when calcium reacts with oxygen.
When copper is heated in oxygen the compound formed is?
When copper is heated in oxygen, the compound formed is copper oxide.
