Q. 15

Respiration requires O2. How did the first cells on the earth manage to survive in an atmosphere that lacked O2?

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.
Related Videos
Interactive Quiz on respiration in plants40 mins
Interactive Quiz on Respiration in Plants53 mins
Detailed Explaination of Photosynthesis in 50 Minutes57 mins
Diffusion & Osmosis | Interactive QuizFREE Class
Interactive Quiz on Transport of Phloem Sap51 mins
Mechanism of vertical transport of water in plants from roots to leaves53 mins
Interactive Quiz - Active transportFREE Class
Biological nitrogen fixation in legume plants14 mins
C3 and C4 cycle - Getting NEET Ready62 mins
Lets understand the transport across plasma membrane53 mins
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
view all courses