Answer:
It was less prominent in the North than in the South, but it definitely still existed.
Explanation:
Segregation was never enforced by law in the North, however a handful of private companies refused service to people of color, and schools either had mostly Black pupils or mostly white pupils.
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.
It lies in the fact that the senior party to any relationship provided land and oversight to the junior party’s who in turn was expected to provide his lord with economic and military support.
General jean-baptiste kléber
