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

After the end of world war one before World War 2 began many people in Russia were unhappy what

Where was john kipling on the day of august 28 1915?

According to O'Callahan, what are the three parts of a story?

Think about what happened to Standard Oil. Write a paragraph in which you explain whether or not you agree with the actions taken by the government to interfer

would the population of marsh grasses might increase if the population of hernos decreased

What part of the respiratory passageway primarily functions to warm, humidify, and filter inhaled air? what part of the respiratory passageway primarily functio

What is the equation of a directrix of the parabola of x^2+ 4 x + 4 y - 4 = 2-0

The distribution of fat on the body influences the risk of development of heart disease. a. True b. False

Which of these is an organism? a herd of sheep a wolf a drop of water a heart

The founder effect is a type of genetic drift. Which statement best describes the immediate result of the founder effect on a population of organisms? A. The g