Examlex
When surrounding cells detect ______________ from their neighbors, they prepare for a viral invasion.
United States
A country located primarily in North America, consisting of 50 states and a federal district, known for its significant economic and political influence globally.
South America
A continent located in the Western Hemisphere, mostly in the Southern Hemisphere, with a diverse range of climates, cultures, and economies.
User Cost
The cost associated with the use of a capital good, which includes the opportunity cost of not using the good in an alternative way and the depreciation cost.
Quantity Extracted
The amount of a resource or good that is removed or harvested from its source over a specific period.
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