DREADFUL101 DREADFUL101

25-07-2019
Biology

contestada

Which major gas in today’s atmosphere was introduced by living organisms about 2.7 billion years ago?

Respuesta :

madison3395 madison3395

25-07-2019

Answer:

Oxygen

Explanation:

Oxygen is the major gas in today’s atmosphere that was introduced by living organisms about 2.7 billion years ago.

Answer Link

jalierico20 jalierico20

25-07-2019

Answer:Cyanobacteria

Explanation:

Answer Link

Otras preguntas

What structural problem prevents adenine from pairing with guanine?

A large portion of chinas food comes from the ?

The low tempature for five days was -5 -7 -2 and -3 what was the average low tempature for those days

On this day every year, the largest government mailing takes place?

Is 0.7 greater than 0.75 or less than 0.25

moving from coastal to interior regions of sub-saharan we discover that the dominant physical geographic feature is

how can i find the x and y intercepts of a graph equation? (ex. y+ x-4)

words that describe Paris ( DESCRIPTIVE WORDS )

What is it when numbers of a species begin to decline?

Babe, the pig, sings what Christmas song in the movie "Babe" ?