Answer :

The first cells on the earth managed to survive in an atmosphere that lacked O2 because they were anaerobes ,i.e. they did not require oxygen for respiration and instead survived by the breakdown of other inorganic compounds like H2S etc. They survived without the presence of oxygen.


Rate this question :

How useful is this solution?
We strive to provide quality solutions. Please rate us to serve you better.
Try our Mini CourseMaster Important Topics in 7 DaysLearn from IITians, NITians, Doctors & Academic Experts
Dedicated counsellor for each student
24X7 Doubt Resolution
Daily Report Card
Detailed Performance Evaluation
caricature
view all courses
RELATED QUESTIONS :

In the following Biology - Exemplar

Respiration requiBiology - Exemplar

When does anaerobBiology - Exemplar