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Most of Earth's atmospheric oxygen originally came from photosynthesis by early cyanobacteria and other photosynthetic organisms around 2.5 billion years ago. These organisms converted carbon dioxide and water into oxygen through the process of photosynthesis, gradually increasing oxygen levels in the atmosphere.

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What molecule did the oxygen we breathe originally come from?

The oxygen we breathe comes from the process of photosynthesis in plants, where they convert carbon dioxide and water into glucose and oxygen. The oxygen gas is released as a byproduct of this reaction.


Where did oxygen come from?

Oxygen was primarily produced through photosynthesis by early cyanobacteria and other photosynthetic organisms around 2.3 billion years ago. This process involved converting carbon dioxide and water into organic compounds and releasing oxygen as a byproduct into the atmosphere. Over time, this led to the significant increase in atmospheric oxygen levels, paving the way for the evolution of aerobic organisms that rely on oxygen for respiration.


Where does the oxygen atoms in H2O come from?

The oxygen atoms in water (H₂O) come from the air we breathe. When we inhale, our lungs absorb oxygen from the air. This oxygen is then used in the process of cellular respiration to produce energy for our body's cells.


What is breathable air and its connection with lakes?

For human beings breathable air consists of a ratio of oxygen to some inert gas (on earth it is nitrogen). The typical concentration is about 1/5th oxygen and 3/4 nitrogen. Where does oxygen come from? Oxygen readily combines with so many different elements. Hydrogen + oxygen makes water. Carbon plus oxygen makes carbon dioxide. Iron plus oxygen makes rust. Silicon combines with oxygen to make sand. So free atmospheric oxygen is an oddity. Why do we have such an abundance of it? This question brings us to lakes. More particularly, oceans. Earth's early oceans teemed with single celled organisms that absorbed carbon dioxide from the atmosphere or that was dissolved in sea water, and using sunlight broke that molecule apart, releasing the oxygen. After eons these photosynthetic creatures tore apart most of the atmospheric CO2, rendering it into carbon, which they absorbed and used, and releasing the oxygen. After several billion years photosynthetic plants evolved, first in the oceans, and then migrating into the terrestrial sphere (land). But even today most new oxygen come from marine cyanobacteria, mostly in the ocean, but also in lakes and rivers, and to some extent pine needles, leaves on trees and bushes, blades of grass, and ferns.


What two atoms of the same element come together what do they form?

When two atoms of the same element come together, they form a molecule of that element. For example, when two oxygen atoms come together, they form a molecule of oxygen (O2).

Related Questions

Where do most of the objects you use in you life originally come from?

From the earths crust


Where do most of the objects you use in your life originally come from?

From the earths crust


What gas does ozone originally come from?

The ozone originally comes from the oxygen gas. It gets converted into ozone by UV rays.


Where did the oxygen in Earth's atmosphere come from originally?

The oxygen in Earth's atmosphere originally comes from the process of photosynthesis carried out by early photosynthetic organisms like cyanobacteria, which released oxygen as a byproduct. Over time, the accumulation of oxygen led to the development of an oxygen-rich atmosphere.


What molecule did the oxygen we breathe originally come from?

The oxygen we breathe comes from the process of photosynthesis in plants, where they convert carbon dioxide and water into glucose and oxygen. The oxygen gas is released as a byproduct of this reaction.


What is the major atmospheric by product of photosynthesis and where does it come from?

Oxygen which comes from the synthesis of glucose. Oxygen is the by product of 6CO2 + 6H2O to make C6H12O6 releasing three Oxygen (O2) molecules for every molecule of glucose produced.


Where did oxygen originally come from?

Oxygen on Earth originally came from the process of photosynthesis carried out by early single-celled organisms like cyanobacteria. These organisms used sunlight to convert carbon dioxide and water into glucose, releasing oxygen as a byproduct. Over millions of years, this process accumulated oxygen in the atmosphere, leading to the oxygen-rich environment we have today.


How water scorpion breathe?

Water scorpions have air tubes that stick out of the water surface to take in atmospheric oxygen. They come up to the surface several like Dolphins and Whales.


Where does the oxygen in earths atmosphere come from?

The origin of oxygen (and other large elements) is from supernovae. On the smaller scale, the vast majority of our oxygen comes from ocean plants, from tiny algae to giant kelp. The atmospheric oxygen comes from the decomposition of water and carbon dioxide by organisms that use photosynthesis to make useful molecules in combination with the energy from sun light.


How do eels get oxygen?

Like most fish or other aquatic creatures, they have gills that take in oxygen from the water they swim in.


Where did the word fraction originally come from?

Latin, originally.


Where did pumpkins come from originally?

Pumpkin's are originally from America.