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
olga2289 [7]
2 years ago
11

Scientists infer that oxygen first began to enter the Earth's atmosphere after the appearance of

History
1 answer:
Vinil7 [7]2 years ago
5 0

Oxygen entered the Earth's atmosphere after the appearance of the Great Oxidation Event (Great Oxygenation Event). The Great Oxidation is the first mass extinction on Earth.

The Great Oxidation lasted 2.4 to 2.0 billion years ago.

Oxygen appeared on Earth thanks to cyanobacteria using photosynthesis.

You might be interested in
What did john adams mean when he said the revolution was in the minds of the people?
Len [333]
The Revolution was in the minds and hearts of the people; a change in their religious sentiments of their duties and obligations. While the king, and all in authority under him, were believed to govern in justice and mercy, according to the laws and constitution derived to them from the God of nature and transmitted to them by their ancestors, they thought themselves bound to pray for the king and queen and all the royal family, and all in authority under them, as ministers ordained of God for their good; but when they saw those powers renouncing all the principles of authority, and bent upon the destruction of all the securities of their lives, liberties, and properties, they thought it their duty to pray for the continental congress and all the thirteen State congresses, &c.
8 0
2 years ago
Which person was the first US leader to send soldiers to fight in the Vietnam war
Scilla [17]

Answer:

The correct answer is Lyndon Johnson

3 0
3 years ago
Read 2 more answers
Please help quick ,
xxTIMURxx [149]
Popular sovereignty
8 0
3 years ago
What are two lasting legacies of portugal's history
zubka84 [21]
The two lasting legacies of portugal's history would be : 

- Many indigenous culture lost their land
- It showed that small country could make a big impact

hope this helps
6 0
2 years ago
How does WTO assist global trade?
zhannawk [14.2K]

The World Trade Organization (WTO) is the only global international organization dealing with the rules of trade between nations. At its heart are the WTO agreements, negotiated and signed by the bulk of the world's trading nations and ratified in their parliaments.

8 0
3 years ago
Other questions:
  • 3. Which parts of the Articles of Confederation do you think would remain in America's government?
    5·1 answer
  • Why did willam Marbury support te judiciary act iof 1789
    6·1 answer
  • how did advancements in technology and warfare impact the ratio of military to civilian casualties from world war l to World war
    11·1 answer
  • How was the medieval world impacted by the renaissance with respect to philosophy, artistic expression, and general beliefs abou
    8·1 answer
  • Who traveled to Japan in 1852, setting up two trading posts and opening the country to trade with the West? A. Otto von Bismarck
    12·1 answer
  • Which of the following statements about Thomas Hobbes and John Locke is not correct?. . A. Both John Locke & Thomas Hobbes w
    15·2 answers
  • Why did most of the immigrants who came to America in the late 19th century settle in the cities?
    6·2 answers
  • Help please thanks thanks
    11·2 answers
  • An illustrated poster shows a man, woman, and young working in a garden and harvesting vegetables. The text reads Plant a Victor
    14·1 answer
  • What time did high greek culture retain?
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!