Question

Enumerate some important effects of oxygen on evolution.

Answer 1

1. Organisms capable of utilising oxygen for their energy needs survived.
2. Gradually, the Earth’s atmosphere changed from a primitive reducing atmosphere into an oxidizing atmosphere.
3. The development of the ozone layer enabled organisms to migrate from water to land.
4. The oxygen revolution marks the end of abiotic synthesis and the evolution of new forms.
5. Free oxygen in the atmosphere eventually led to the evolution of aerobic respiration.