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What is the cell?
The structural and functional unit of life
What dictates the biochemical activities of cells?
Their shapes/forms and specific subcellular structures
What are the four main concepts of the Cell Theory?
Cells are the building blocks of all plants and animals
Cells are the smallest functioning units of life
Cells are produced through the division of preexisting cells
Each cell maintains homeostasis
How do cells vary in size and shape?
They range from microscopic erythrocytes (7-8 μm) to large oocytes (120 μm); shapes can be spherical, cubelike, columnlike, cylindrical, disc-shaped, or irregular