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are usually simple molecules that often consist of only one or two different elements.
internal transport system of the cell, modifies proteins, and synthesizes lipids
Protein microfilaments that give shape to a cell, support the membrane and microvilli, and provide for attachment and movement.
A watery solution of minerals, gases, organic molecules, and cell organelles that is found between the cell membrane and the nucleus.
One cell with the diploid number of chromosomes divides into two identical cells, each with the diploid number of chromosomes.
Movement of molecules from an area of greater concentration to an area of lesser concentration.
Requires the energy of ATP to move molecules from an area of lesser concentration to an area of greater concentration.
The outermost epidermal layer, consists of many layers of dead cells; all that is left if their keratin.
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