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Slavery arrived in North America along side the Spanish and English colonists of the 17th and 18th centuries, with an estimated 645,000 Africans imported during the more than 250 years the institution was legal. But slavery never existed without controversy. The British colony of Georgia actually banned slavery from 1735 to 1750, although it remained legal in the other 12 colonies. After the American Revolution, northern states one by one passed emancipation laws, and the sectional divide began to open as the South became increasingly committed to slavery. Once called a “necessary evil” by Thomas Jefferson, proponents of slavery increasingly switched their rhetoric to one that described slavery as a benevolent Christian institution that benefited all parties involved: slaves, slave owners, and non-slave holding whites. The number of slaves compared to number of free blacks varied greatly from state to state in the southern states. In 1860, for example, both Virginia and Mississippi had in excess of 400,000 slaves, but the Virginia population also included more than 58,000 free blacks, as opposed to only 773 in Mississippi. In 1860, South Carolina was the only state to have a majority slave population, yet in all southern states slavery served as the foundation for their socioeconomic and political order.
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the students who has been thinking about it
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Greek city-states developed different forms of governance with very different political structures and strengths.
Greek colonization led to the spread of the Greek language and Greek culture, but it also resulted in tensions with the neighboring Persian empire, culminating in the Persian Wars.
Athens developed democratic institutions and a culture of philosophy, science, and culture; it emerged as a powerful state and allied with other city-states, forming the Delian League.
Resistance to Athens’ power among the other Greek city-states, particularly Sparta, prompted the Peloponnesian War.
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<em><u>The answer is</u></em>: <u>They not only serve for Regenerative Medicine, but also for the "screening" of new drugs, and some other things.</u>
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Currently, studies in regenerative medicine are aimed at research and knowledge of induced pluripotent cells (iPSCs). For some, they are the cells called to take over from embryonic stem cells (ESCs), which until recently were the main objective of research in this field of biomedicine.
<u>Since the first cultures of mouse embryonic cells derived from blastocysts were obtained in 1981</u>, the foundations were laid for the development of the necessary methodologies that would lead later to generate human embryonic cells with characteristics similar to those of the mouse.
In addition to their interest in Regenerative Medicine, these types of cells are a tool of great value for the "screening" of new drugs, as well as a model to study the etiology of diseases that originate during the embryonic stage, and to study processes that occur during human embryonic development
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<em><u>The answer is</u></em>: <u>They not only serve for Regenerative Medicine, but also for the "screening" of new drugs, and some other things.</u>
