El Paleozoico se divide en seis períodos: Cámbrico (la vida animal florece en los mares), Ordovícico (dominan los invertebrados), Silúrico (primer animal de respiración aérea), Devónico (aparecen peces con escamas duras y los anfibios), Carbonífero (aparecen grandes bosques de helechos, primeros reptiles etc,
Answer: B
Explanation:He alqways started
The constitution of the United States set up a set of checks and balances among the three branches of government. The Legislative, Executive and Judicial powers constitute the structure of the american government, and they have power to check each other's way of work.
One example of the check and balance system is that the Supreme court of the United States may check congress by declaring a law passed by this one as unconstitutional. This is a clear check limit used against the legislative power, that is the congress. But on the other hand, the power is balanced because the members of the Supreme Court are appointed by the President of the country (the Executive power), and to be appointed they have to be approved by the Congress.
Answer:
Americans entered the war in 1917 by declaring war on Germany. This was due to the attack on Lusitania, the unrestricted submarine warfare on American ships heading to Britain, and Germany encouraging Mexico to attack the USA. A British passenger ship that was sunk by a German U-Boat on May 7, 1915. 128 Americans died.
Explanation:
When Napoleon invaded Spain, Spain started a six-year war with France that wrecked its economy and social system, and changed the government. This made it hard for Spain to stop a revolution in its colonies.
