1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
spin [16.1K]
3 years ago
11

Where did the original atmospheric oxygen come from

Geography
1 answer:
faust18 [17]3 years ago
3 0

The correct answer is - cyanobacteria.

The atmospheric oxygen came from the cyanobacteria. These were one of the earliest living organisms on Earth. The cyanobacteria was using photosynthesis in order to create its own food. The photosynthesis process requires sunlight, carbon dioxide, water, and oxygen. The oxygen is mostly released as a waste product from the process of photosynthesis, thus the cyanobacteria were literally releasing oxygen that was ending up into the atmosphere. As more and more cyanobacteria there were across the planet, more and more oxygen they were releasing into the atmosphere, slowly changing the composition of the atmosphere, and setting the basis of it as we know it now.

You might be interested in
Why might people in England in 1938 have supported appeasement
Tcecarenko [31]
They thought that it might keep them safe from harm.
8 0
3 years ago
Which state would have a warmer climate montana or florida why?
qwelly [4]
Florida has a warmer climate than Montana because it is closer to the equator, therefore, warmer that Montana which is nearer the poles. The farther the south the warmer, and the farther the north the colder. Florida's most important resources is a mild and sunny climate that making a major tourist center and a retirement home for millions of transplanted northerners. 
6 0
4 years ago
Read 2 more answers
If a culture is situated near a body of water, and that body of water plays a role in the survival of those people, what unique
Bas_tet [7]
Thank you for posting your question here at brainly. The unique feature might develop if a culture is situated near a body of water, and that body of water plays a role in the survival of those people is letter B which is "The culture might value water more than others do." <span>because they will start valuing water a lot , an example would be the ancient Egypt</span>
4 0
4 years ago
What religions do East Asians follow?
Vsevolod [243]

Answer:

Asians is the largest and most populated continent and the birthplace of many religions including Buddhism, Christianity, Confucianism, Hinduism, Islam, Jainism, Judaism, Shinto, Sikhism, Taoism, and Zoroastrianism.

Explanation:

I hope this helped you ;)

6 0
3 years ago
In order to meet the projected needs of the population in 2050, agricultural production will need to ______.
Georgia [21]

Answer:b

Explanation:

3 0
3 years ago
Other questions:
  • Magnetic striping is evidence of
    9·2 answers
  • Suppose that now you want to make a scale model of the solar system using the same ball bearing as in part (a) to represent the
    11·1 answer
  • The study of climates and their effect on people is called:
    13·1 answer
  • PLEASE HELP MEE<br> why are weather maps important to meteorologists
    9·1 answer
  • The magnitude of an earthquake is typically calculated according to the _______ scale.        A. Mercalli   B. Fujita   C. Richt
    11·1 answer
  • Like other major cities, Los Angeles has experienced violence and civil unrest. Why did Los Angeles experience riots in 1992?
    7·2 answers
  • Where are the amazon, paraná, and orinoco river systems located?
    6·1 answer
  • How do we use geography in our everyday lives
    8·2 answers
  • Explain two examples of farm records.​
    11·1 answer
  • About what % of the Earth surface is covered by Oceans?
    7·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!