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.
Answer:
girl here you go
Explanation:
Parliament, outraged by the Boston Tea Party and other blatant acts of destruction of British property, enacted the Coercive Acts, also known as the Intolerable Acts, in 1774. The Coercive Acts closed Boston to merchant shipping, established formal British military rule in Massachusetts, made British officials immune to criminal prosecution in America, and required colonists to quarter British troops. The colonists subsequently called the first Continental Congress to consider a united American resistance to the British. on July 4, 1776, the Second Continental Congress officially adopted the Declaration of Independence. Five years later, in October 1781, British General Charles Lord Cornwallis surrendered to American and French forces at Yorktown, Virginia, bringing to an end the last major battle of the Revolution. With the signing of the Treaty of Paris with Britain in 1783, the United States formally became a free and independent nation.
It is false that is gave cherokees permission to attack anyone who settled on thier land. The trail of tears actually were taken from thier land hundreads of miles to a reserve on the trail of tears.
