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Linear programming is useful for allocating scarce resources among competing demands.
Vessel Elements
Of xylem, cells that form in stacks and die when mature; their pitted walls remain to form water-conducting tubes. Each tube consists of a stack of vessel elements that meet end to end at perforation plates.
Stomata
Small openings on the surface of leaves and stems that allow for gas exchange.
Humidity
A measure of the amount of water vapor in the air, affecting weather, climate, and comfort levels.
Chemical Signals
Molecules released by organisms to communicate with each other, playing critical roles in behaviors such as mating, aggression, and territory marking.
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