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What is considered to be the first evidence of differentiation in the cells of an embryo?
1990s
The decade extending from January 1, 1990, to December 31, 1999, marked by significant global events, technological advancements, and cultural shifts.
United States
A country located in North America, comprising 50 states, a federal district, and several territories, known for its diverse cultures and large economy.
Intergenerational Mobility
Intergenerational Mobility refers to the changes in social status that occur from one generation to the next within a family or lineage.
Intragenerational Mobility
The movement of an individual within the social hierarchy during their lifetime, which can be upward or downward in terms of social class, income, and status.
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