Practice question
Question
Main source of atmospheric oxygen was:
Explanation
Photosynthesis reflects key principle in quiz on section b solved pyqs, where evolutionary mechanisms shape genetic variation and adaptation. In this context, Photosynthesis aligns with experimental and theoretical evidence from population genetics, behavioral ecology and molecular phylogeny. Textbooks like Campbell Biology, Futuyma Evolution and Hartl Principles illustrate supporting data. Understanding why Photosynthesis fits helps integrate natural selection, environment.