Cyanobacteria, also known as "blue-green algae", are the unicellular organisms which are able to produce oxygen.
Approximately 540 years ago, the atmosphere was very poor on oxygen. Cyanobacteria are thought to be responsible for the oxidization of the atmosphere back then, in an event known as <em>"The Great Oxygenation Event"</em>. As a result, Earth's life forms suffered drastic changes in their composition, as they evolved from being <em>anaerobic</em> to becoming organisms <em>highly dependant</em> on oxygen. The oxygenation of the atmosphere would eventually provide the adequate environment in order for the <em>Cambrian Explosion</em>, or the first diversification of living organisms, to happen.
The role of the ohio river was very important because it provided resources for the different nations.
Because the government were not good.
Respondent, John Abel, was charged with robbing a bank with two other men. In order to discredit Respondent’s witness, the prosecution offered testimony that he and the witness were part of a prison gang that promoted perjury on the behalf of fellow gang members.