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Digiron [165]
3 years ago
9

What role did cyanobacteria play in the cambrian explosion? quizet?

History
1 answer:
VARVARA [1.3K]3 years ago
6 0

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.  

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What were the key elements that allowed the colonials to win the War for Independence? What people and events were important to
liberstina [14]

1. The alliance with France was really important because of the military power it gave to the United States, and not only that but it raised a lot of tension in other matters between the two European countries. Also the intervention of other nations like Spain and Netherlands turned the tide for the Americans a lot.

2. Military training and preparation is an element that can't be ignored, political issues were important but the performance on the battlefield was decisive for the outcome of the war, the war strategies and logistics were undoubtedly a key element in the victory of the colonials.

3. Political division in England as there was an internal conflict in the parliament as of the nature and future actions in the war.

4. The british alienated many potential supporters, like for example the Loyalist, who were almost 50.000 willing to defend and mantain control of the colonies, but they did not take advantage of that.

George Washington, Commander in Chief. (USA)

Nathanael Greene, General (USA)

Sir William Howe, Commander in Chief ( British forces)

Henry Clinton, Office, (British forces).

Events: Siege of Yorktown and Treaty of Paris.

This events were important because they marked the end of the war, they defined how the events were going to be in the future, how things were going to turn out in the future, the siege because of the surrender of more than 7000 men under Cornwallis command and after that event the battles in America decreased and died out and the Treaty because of how the war developed and concluded it geographically delimitated the territory that now we know as the United States of America.

4 0
3 years ago
(25 POINTS!! PLEASE ANSWER QUICK!!) Choose only the CORRECT statements that describes the United States' movement from neutralit
Rama09 [41]

These are the correct statements that describe the United States' movement from neutrality to engagement in World War I.  

  • One of the main causes of the United States declaring war on Germany was the use of unrestricted submarine attacks.
  • President Wilson campaigned in the 1916 election with the slogan "He kept us out of war."
  • The United States began to support war against Germany after the Zimmerman telegram was intercepted.
  • The Zimmerman Telegram was from Germany to Mexico, promising them territory gained in the Mexican-American war if they allied with Germany.

Further details / historical context:

Prior to World War I, the United States had adopted a mostly isolationist view, not wanting to be involved in affairs across the ocean that were not directly related to our national security.   When the war broke out, the United States did not impose a trade embargo on either side -- but American trade tended to be more with the Allies than with Germany. Similarly, President Wilson permitted loans to both sides, but loans to the Allies by 1917 were more than $2 billion, while American loans to Germany were only around $27 million.

Though Wilson campaigned in 1916 on the fact that he "kept us out of the war," by 1917 he and the nation were ready to go to war.

The reasons that led to US declaration of war:

  • In January, 1917, Germany had resumed its policy of unrestricted submarine warfare.  Germany had halted its attacks on non-military vessels (which it suspected of carrying military supplies) after the furor over the sinking of the Lusitania in 1915.  But now Germany was resuming attacks by its U-boats.
  • In February, 1917, the "Zimmerman Telegram" was intercepted by British intelligence and shared with the US.  Germany's foreign minister, Arthur Zimmerman, had telegraphed an offer to Mexico's ambassador seeking Mexico's support in war vs. the United States in exchange for getting land back from the US.
  • On April 2, 1917, President Wilson made a powerful speech to Congress in which he argued that the nation needed to enter the war "to make the world safe for democracy."  Wilson's speech was powerfully convincing, and four days later, Congress declared war.
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3 years ago
What is the Hippocratic oath
saveliy_v [14]
Ummm...I think that's the oath that states the obligations and proper conduct of doctors, formerly taken by those beginning medical practice. Parts of the oath are still used in most medical schools.
3 0
3 years ago
Which term refers to how each branch of government regulates the power of the other branches?
Firdavs [7]

Answer: D, checks and balances

Explanation: took the test!

7 0
3 years ago
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Valentin [98]

They wanted to prevent the leaders of the confederacy from returning to power after the war, they wanted the republican party to become a powerful institution in the south, and they wanted the federal government to help african americans achieve political equality by guaranteeing their rights to vote in the south.

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3 years ago
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