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

What are 2 numbers that when multiplied together you get 360 and when added together you get -96

what describes the solvent in any solution

true or false? Three common voltage sources are batteries, solar cells, and generators.

Why was there growing involvement of the USA in Europe in the years 1945-48 ??

In little Marsden the population is 17 222. The men and women together total 9142 and the women and children together total 13 201. There are ...... Women There

List two factors that might cause an organism to restrict its use of a resource.

What is the electron configuration of helium

What is the formula for the volume of a cuboid?

a piece of wood is 180cm long, Tom cuts it into three pieces in the ratio 2:3:4 Work out the length of the longest piece

A sequence has an initial value of 10 and each term is twice the previous term. Which function models this sequence?1) a(n)=10(2)^n2) a(n)=10(2)^n-13) a(n)=10+2