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Almost all green plants, but especially the cyanobacteria and phytoplankton (microscopic plants) that occur in the oceans.
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Which organisms produce about half of the oxygen on Earth?
trees
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 other organisms make air?
No organisms make "air." Air is the natural atmosphere of the earth. Most of it is nitrogen. Most plants take in carbon-dioxide, and produce oxygen. Most animals take in oxygen, and produce carbon dioxide.
How would the life of human being be if there was no plant life on the earth?
If there was no plant life on earth, there would be no human life, or animal life of any kind. Without plants, there would be no autotrophs (organisms that produce their own food) so other organisms, which need to consume food, there would be no food for other organisms. Also, since plants produce oxygen for heterotrophs (organisms that consume food to produce energy), there would be no oxygen for us to breathe and we would suffocate.
What organisms make most of earth's oxygen?
sea organisms
What organisms produce about half of the earths oxygen?
trees
What bacteria are thought to be responsible for establishing Earth's oxygen-rich atmosphere?
Cyanobacteria are believed to be responsible for establishing Earth's oxygen-rich atmosphere. Nearly 2.3 billion years ago, these microbes, which lived in the seas, were the first organisms to produce oxygen, leading to the transformation of the Earth's environment.
Deforestation kills many organisms that produce oxygen. What oxygen-producing organisms would remain if all the forests were destroyed?
plankton
Does cellular respiration produce oxygen in green organisms?
yes
What would happen in an ecosystem is there were no more organisms that produce carbon dioxide than organisms that produce oxygen?
The organism would die
Was oxygen on Earth before or after life on Earth?
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 organisms produces about half of the oxygen on earth?
trees
