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Small, darkened region inside of nucleus.Regulates what enters and leaves the cell.Contains lipids (bilayer), proteins (channels),Īnd carbohydrate chains (identification cards).S organelles only found in plant cells, NOT Ex/mitochondrion produces energy (in the form ofĬELLS ? TISSUE ? ORGANS ? ORGAN SYSTEM ? ORGANISMĬELL MEMBRANE Regulates what enters and leaves.A well-defined, intracellular body that performs.Pro- before Eu- true -karyon kernel/nucleus Eukaryotes organism whose cells contain nuclei.Prokaryotes organisms whose cells lack nuclei.(Prokaryotes) OR a membrane bound organelle Either free-floating DNA in center of the cell.Control Center controls all of the cells.Material between the cell membrane and the.Cytoplasm site of many chemical reactions of.Plasma Membrane regulates what enters and.Therefore, most cells are microscopic in size.Materials to enter or leave the cell quickly The surface area (the membrane) would not allow.As a cell grows, its volume increases much.What is the problem with cells getting too Limited by the relationship of the cells outerħ.What factor limits the size that most cells Cell shape evolved to allow the cell to perform.Can be simple or complex depending on its.