Carbon and fluorine combine covalently to form a binary compound. the formula of the compound with the name carbon tetrafluoride is CF4.
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External Regulators<span>. </span>External regulators<span> are also </span>proteins<span>, but they react to stimuli from outside the cell. They direct cells to either speed or slow the cell cycle based upon outside conditions. For example, one </span>protein<span> reacts to molecules on the outside of a neighboring cell.
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1. Plastic is made of natural chemicals and is used for multiple things, such as culinary sets and water bottles
2. Metals are found in mines, and are used for currency and engineering
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Evaporation<span> accounts for the movement of water to the air from sources such as the soil. </span>Transpiration<span> accounts for the movement of water within a plant and the subsequent loss of water as vapor through stomata in its leaves</span>
