Before there was any life on earth, which gas was absent from earth’s ancient atmosphere?

a. nitrogen

b. ammonia

c. oxygen

d. methane

Which statement best describes lactic acid fermentation? a. lactic acid fermentation is the first step of cellular respiration. o b. lactic acid fermentation is the final step of cellular respiration. re to berate c. in the absence of oxygen, cells release atp by breaking down lactose into glucose. e der lade res o d. in the absence of oxygen, cells release atp by breaking down glucose into lactate. ar

Which is not a likely outcome after extensive irrigation of dry farmland? useless, unproductive soil salinization of the soil depletion of groundwater nutrient-rich soil

Plz quick a natural resource that is replaceable through a cycle in nature or sustainable practice is called a? the subject is science