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Analyze the economic changes that were set in motion by Alexander the Great's conquests.
Atoms
The simplest units of all matter.
Element
A pure chemical substance consisting of one type of atom, distinguished by its atomic number.
Cell Membrane
The semi-permeable membrane surrounding the cytoplasm of a cell, responsible for controlling the movement of substances in and out of the cell.
Body Tracts
Pathways or channels in the body through which biological substances flow, such as the gastrointestinal tract or neural tracts.
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