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According to Porter's model, four competitive forces determine industry profitability.
Palisade Layer
A layer of closely packed, vertically oriented cells found in the upper part of leaves, containing chloroplasts for efficient photosynthesis.
Petiole
The stalk attaching the leaf blade to the stem in plants, providing support and transporting nutrients and water between them.
Proton Pumps
Membrane-bound enzymes that actively transport protons (H+) across a membrane, generating an electrochemical gradient used for energy.
Chloride Ions
Negatively charged chlorine atoms that are important for maintaining fluid balance, transmitting nerve impulses, and regulating acid levels in the body.
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