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.
A.
What A basically says is that the British allowed African American people to vote, since they where a minority and would never be too influential in elections.
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In a RV or maybe a airplane hope this helps
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Social History is history that looks back on a person's lived experiences. But, social history also emphasizes social structures and the interaction of different groups in society rather than affairs of state.
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Explanation:
Cotton was the "king" crop in the deep south, referred to as "white gold" thus making it worth a lot of money. With that being said, if you were one of the landowners of a cotton field, in simple terms you were racking out the dough! Most land owners of the time cotton or not were wealthy due to the high demand and need of farmers.
