0
Elemental oxygen did not appear on Earth until some time after life did. In fact, the oxygen was produced by life carrying out photosynthesis. The first organisms on Earth were anaerobic, meaning their life processes did not involve oxygen. To most organisms like this, oxygen was highly toxic.
What else can I help you with?
Why is oxygen such an important part of the earth's atmosphere?
Oxygen is necessary for most organisms to carry out their life functions.
How would life on earth be different if the atmosphere were eighty percent oxygen?
help
What effect did photosynthetic cyanobacteria have on earth's environment?
Photosynthetic cyanobacteria were the first organisms to produce oxygen. The effect of their oxygen production was that the earth became an environment which was suitable for life.
What element is life on earth based on?
Life on Earth is carbon-based. Carbon forms bonds with hydrogen and oxygen to create organic compounds. It is also often said that all life depends on water, meaning that all life requires the hydrogen and oxygen atoms too.
Why is earth capable of supporting life?
because plants give off oxygen and support life for us and we have water.
Before there was any life on earth which gas was absent from earth's ancient atmosphere?
Oxygen was absent from Earth's ancient atmosphere before there was any life on Earth. The early atmosphere was composed mainly of gases like carbon dioxide, water vapor, nitrogen, and small amounts of methane and ammonia.
How does oxygen make life sutable on earth?
Oxygen makes it human capable of breathing in earth that's why when there is oxygen, there is life.
Effects of no oxygen on earth?
Oxygen is main gas of earth. If there is no oxygen in the earth all the life in the earth should die.
What were four events that had to happen before life could form on earth?
Four events that had to happen before life could form on Earth include the formation of the Earth from cosmic dust and gas, the cooling of the Earth's surface to support liquid water, the development of an atmosphere with essential gases like oxygen, and the emergence of organic molecules through chemical reactions.
What was the earth's atmosphere like before photosynthesis?
Without life because when plants do photosynthesis, they produce oxygen.
Is oxygen manmade?
No. Earth's oxygen is provided by plants. Humans need oxygen to live, so we could not have been there before there was oxygen, so we could not have made the oxygen.
Which gas in Earth's atmosphere suggests that there is life on Earth?
The presence of oxygen in Earth's atmosphere suggests there is life on Earth. Oxygen is produced primarily by plants and certain bacteria through the process of photosynthesis. Its abundance indicates the ongoing presence of life forms that release oxygen as a byproduct of their metabolic processes.
Where does oxygen come from and why is it important to life on earth?
Oxygen is important as it the breathing sources. It also forms ozone which is vital for life on earth.
Was least likely to have been a component of Earths atmosphere before life began?
oxygen
Why do you consider life possible only on planets where there is oxygen?
This is a false presumption. The life that exists on Earth now is dependent on oxygen, but it was not always so. Life on Earth emerged long before there was any noteworthy amount of oxygen. In fact oxygen was highly toxic to the first organisms. Oxygen began to build up in the atmosphere when cyanobacteria began carrying out photosynthesis, which uses sunlight to convert water and carbon dioxide into sugar and oxygen.
Which Gas that is needed for life on Earth?
Oxygen
What key attractions does earth have?
oxygen, life
