KendrahX561393 KendrahX561393

03-11-2022
Biology

contestada

About how long ago did oxygen begin to accumulate in earth's atmosphere?A. 2 billion yearsB. 0.2 millionC. 2 millionD. 20 million

Respuesta :

AllyiahA88631 AllyiahA88631

03-11-2022

Oxygen was accumulated in the earth's atmosphere thanks to the origin of photosyntetic organisms about 2.4 billion years ago, which emitted oxygen as a result of the process.

So correct option is A. 2 billion years.

Answer Link

Otras preguntas

Divide 102 dollars among 3 boys. A,B, and C, so that A gets twice as much as B and C gets 1 1/2 times as much as A. How much does each boy get?

Please give answers ! 17 points please help

The angles of a quadrilateral measures 80,100. 100 and 80 in this order . what kind of quadrilateral has this shape? how do you know?

Explain - What are some ways gravity shapes Earths surface

The movie theater has 250 seats 225 seats were sold for the carriage showing what percent of seats are empty?

Determine the quantity of work done when a crane lifts a 100-N block from 2 m above the ground to 6 m above the ground. A. 100 J B. 200 J C. 400 J D. 600 J

what Battle proved to be the single bloodiest day in American history.

Which Chinese dynasty is known for the achievements listed here? A. Ming B. Tang C. Song D. Han Accomplishments: ~improved porcelain by adding more colors

Simplify (–x2 +5) – (3 – 4x2)

Settlement where religion was taught