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Which germ layer is the brain and spinal cord derived from?
Opportunity Cost
Opportunity cost represents the value of the best alternative that is foregone when a choice is made between several mutually exclusive options.
Avatar
A graphical representation of a user in digital media, often used in social media, games, and virtual reality environments.
Tattoo
A permanent form of body art made by inserting ink into the layers of skin to change the pigment.
Esther Duflo
A French-American economist known for her research in development economics and as a recipient of the Nobel Prize in Economics.
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