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Sociologists have observed that upper-middle-class blacks earn __________ percent of what their white counterparts earn.
David Haig
An evolutionary biologist known for his work on genetic conflict, parental investment theories, and the evolutionary origins of genomic imprinting.
Placenta
A temporary organ that connects the developing fetus to the uterine wall to allow nutrient uptake, thermo-regulation, waste elimination, and gas exchange via the mother's blood supply.
Eurasian Penduline Tit
A small passerine bird known for its unique breeding behavior and the elaborate nests built by males to attract females.
Costs And Benefits
The negative and positive outcomes respectively associated with a particular decision, action, or investment, evaluated in terms of overall impact.
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