The succession stages differ from primary succession as the stages are nothing more than mere points of succession. Meanwhile, primary succession is considered to be a complete success and not just a point in success. I hope that this is the answer that you were looking for and it has helped you.
10.9 billion is the predicted world population for thr year 2100
Cyanobacteria were very simple organisms and performed were an role in changing Earth's early atmosphere. They carried out photosynthesis to produce the materials they needed to grow. In this process, they release Oxygen which is needed to sustain life on Earth for Humans and other organisms.
