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Hewlett-Packard Withholds Customization of Its Laser Printers as Long as Possible

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Hewlett-Packard withholds customization of its laser printers as long as possible. This is an example of


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Pressure Flow Theory

A model explaining how sugars are transported in plants, suggesting that sugars move from sources, where they are produced, to sinks, where they are used or stored, through the phloem via pressure gradients.

Nitrogen-Fixing Bacteria

Bacteria that convert atmospheric nitrogen into ammonia, a form accessible to plants for nutrition.

Essential Elements

Nutrients required for organisms to perform vital bodily functions and sustain life, which cannot be synthesized by the organism.

Cohesion-Tension Theory

A theory that explains the movement of water and nutrients from roots to leaves in plants through the cohesive and adhesive properties of water.

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