Examlex
If there are positive externalities from education,the market will not produce the socially optimal level of education.
Companion Cell
In phloem, cell that provides metabolic support to its partnered sieve element.
Source Region
An area where specific air masses form, characterized by its uniform temperature and humidity patterns influencing weather and climate.
Sugars
Simple carbohydrates that are used as a primary energy source for living organisms.
Perforation Plate
A structure found within the vessel elements of plants, characterized by a membrane or wall with holes that allow for the movement of water and solutes.
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