The atmosphere became oxidising with the appearance of

The prebiotic atmosphere of the earth was of a reducing nature. It was transformed into a oxidising atmosphere of present day due to the emergence of

The prebiotic atmosphere of the earth was of a reducing nature. It was transformed into a oxidising atmosphere of present day due to the emergence of

The atmosphere of the earth at the time of origin of life was I.reducing II.with lack of free oxygen III. oxidising IV.similar to recent atmosphere

Assertion:After the appearance of oxygen in the atmosphere, methane and ammonia began to disappear. Oxygen is involved in forming ozone layer.

Dinosaurs became extinct in

Dinosaurs became extinct in

Dinosaurs became extinct in

Dinosaurs became extinct in