answersLogoWhite

0

Before there was oxygen life tended to exist in water as a form of algae which breathed in carbon dioxide and exhaled oxygen like plants. bacteria also existed at underwater thermal vents like the ones they have discovered at the ocean floor.

User Avatar

Wiki User

16y ago

What else can I help you with?

Related Questions

Is oxygen found outside earths atmosphere?

Yes. Earth's atmosphere is about 21% oxygen. Without it, the vast majority of life we see, including humans, could not exist.


What would have happened to the animals if there was no oxygen from the beginning?

There was no oxygen in the beginning. Plant life developed and released oxygen gas into the atmosphere over a long period of time.If that had never happened, there would not be much if any free oxygen in the atmosphere and aminal life as we know it would never have developed.


Can you name the gas that exist in the atmosphere that we cant live with out?

oxygen


Why on Earth got atmosphere?

Earth has an atmosphere because gravity keeps gases from escaping into space. The atmosphere helps regulate temperature, protects against harmful radiation from the sun, and provides the oxygen needed for life to exist.


Is oxygen always in diatomic state?

Oxygen has a diatomic molecule and ozone a triatomic molecule.But also monoatomic oxygen exist.


Does lightning need oxygen to exist?

No, lightning does not require oxygen to exist because it is an electrical discharge that occurs in the atmosphere. Lightning is the result of an imbalance of electrical charges in the atmosphere and is not dependent on the presence of oxygen.


What planet has water oxygen and regulated temputurs?

Earth is the planet that has water, oxygen, and regulated temperatures that can support life as we know it. Its atmosphere and location within the habitable zone allow for these conditions to exist.


Does oxygen exist?

Yes, oxygen is a naturally occurring element that is essential for life on Earth. It is a colorless, odorless gas that makes up about 21% of the Earth's atmosphere. Oxygen is also found in compounds such as water and carbon dioxide.


On earth oxygen usually exist as what?

Oxygen usually exists as a diatomic molecule, O2, in the Earth's atmosphere.


How did the oxygen in the atmosphere get there?

The oxygen in Earth's atmosphere has been generated, over geological time, by the plant life on Earth.


Can life exist on mars why or why not?

No life is known to exist there. It is too cold, too dry, and there is very little atmosphere.


How does the atmosphere preserve life on Earth?

There is oxygen in the atmosphere. This lets us breathe.