what gas present in todays atmosphere was largely absent from early earths atmosphere?\ncarbon…

what gas present in todays atmosphere was largely absent from early earths atmosphere?\ncarbon monoxide\ncarbon dioxide\nnitrogen\noxygen

what gas present in todays atmosphere was largely absent from early earths atmosphere?\ncarbon monoxide\ncarbon dioxide\nnitrogen\noxygen

Answer

Answer:

D. oxygen

Brief Explanation:

Early Earth's atmosphere had little free - oxygen. It was mainly composed of carbon - based gases like carbon monoxide and carbon dioxide, and nitrogen. Oxygen accumulated later due to photosynthesis by early life forms.