manyah7470 manyah7470
  • 04-03-2019
  • Biology
contestada

Before there was life on earth, which gas was absent from the ancient atmosphere?

A. ammonia
B.methane
C .nitrogen
D. Oxygen

Respuesta :

ash34321
ash34321 ash34321
  • 04-03-2019
D oxygen there was no free oxygen on the earth
Answer Link

Otras preguntas

use labouring in a sentence
I need HELP!!!!!!!!!
The internal conflict that both Felix and Antonio face is O how to end their friendship so they can fight each other O how to avoid shame if they lose the fight
help :( its a ruff day Grade 8 History Strand A Digital Lesson 6 In point, form explain the platforms of each political party ill give u brainlist if you do al
Which is a rational function?
What is ethical about using a 23 and me test kit
PLEASE HELP! If triangle MNO and triangle PQR are similar, which of the following must be true?
Which XXX completes the definition of the generic method, avgNum? public class FindAverage { XXX { long tripleSum; tripleSum = item1.longValue() + item2.longVa
A. 71 B. 84 C. 29 D. 67
. Aşağıdaki şekilde hazırlanan tampon çözeltilerin pH'larını hesaplayınız? a) 8 mmol NaCH3COO+ 200 mL 0.1 M CH3COOH b) 100 mL 0.05 M NaOH+ 100 mL 0.175 CH3COOH