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Atmospheric oxygen is a result of photosynthesis by plants (including cyanobacteria - blue-green algae - which was responsible for the initial conversion of earth's atmosphere from its anoxic state).

Photosynthesis is carried out in plants. It employs energy from the sun and naturally occurring water and carbon dioxide to produce sugar and oxygen gas. The oxygen is released to the atmosphere, and the sugar is formed into plant matter, which eventually dies and is buried and turned into coal and oil and gas.

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What was the importance of photosynthesis in the evolution of the earths atmosphere?

Photosynthesis played a crucial role in the evolution of Earth's atmosphere by producing oxygen as a byproduct. This process greatly increased the amount of oxygen in the atmosphere, making it possible for aerobic organisms to thrive and leading to the development of more complex life forms. The rise of photosynthetic organisms also contributed to the stabilization of Earth's climate over time.


Which process in living things evolved as oxygen levels increased in earths atmosphere?

Aerobic respiration evolved as oxygen levels increased in Earth's atmosphere. This process allows living organisms to efficiently extract energy from food by using oxygen to break down glucose molecules and produce ATP. As oxygen became more abundant, organisms that could perform aerobic respiration gained a significant evolutionary advantage.


How much of earth's atmosphere is composed of nitrogen gas?

The earths atmosphere is made up of 78% nitrogen and 21% oxygen


Which atmosphere gas is photosynthesis the major source of?

Oxygen is the major source of photosynthesis in the atmosphere. During photosynthesis, plants and other photosynthetic organisms convert carbon dioxide into oxygen through the process of photosynthesis. This oxygen is then released into the air, replenishing the levels in the atmosphere.


What do you think is the source of oxygen in our atmosphere?

The source of oxygen in our atmosphere is primarily from photosynthesis, a process carried out by plants, algae, and some bacteria. During photosynthesis, these organisms use sunlight to convert carbon dioxide and water into oxygen and glucose. This process is essential for maintaining the oxygen levels in our atmosphere.