Answer:
Following the Cuban Revolution of 1959, bilateral relations deteriorated substantially. In October 1960, the U.S. imposed and subsequently tightened a comprehensive set of restrictions and bans against the Cuban government, ostensibly in retaliation for the nationalization of U.S. corporations' property by Cuba.
Answer: The Great Wall of China was built as a military defensive line to defend the invasions from some northern nomadic nations. Apart from the function of defense, the wall also boosted the economy, as well as promoted the culture exchange and national integration of different nations at its two sides.
Explanation:
Answer:
D. Both B and C are correct.
Explanation:
Heinrich Anton de Bary was the German botanist who is known for his work on the fungi and algae causing plant disease.
He coined the term "symbiosis" for the unrelated species which live together and mutually benefit others as he studied the formation of lichen, the symbiotic relationship between the fungus and the algae.
There were many limitations to the concept of the symbiotic relationship introduced by the Bary as his work was based on the assumptions that the interaction between the organism is fixed and has the amensalism interaction was not mentioned by him.
Thus, Option-D is the correct answer.
Ivan III (the Great) Ivan III (the Great) (1440–1505) Grand Duke of Moscow (1462–1505). He laid the foundations of the future Russian Empire. By 1480 Moscow's northern rivals, including Novgorod, were absorbed by conquest or persuasion, domestic rebellion was crushed, and the Tatar threat was ended permanently.
A. Slavery in the Americans was no different than slavery in Ancient Greece or Rome.
