Biology - Class XI

Cell Theory and Prokaryotic vs Eukaryotic Cells

The foundational idea that all living things are made of cells, and the two broad categories of cells.

Cell Theory

States that all living organisms are composed of cells, and that the cell is the basic unit of structure and function in life.

Prokaryotic vs Eukaryotic Cells

FeatureProkaryoticEukaryotic
NucleusAbsent (no nuclear membrane)Present (true, membrane-bound nucleus)
Membrane-bound organellesAbsentPresent
ExampleBacteriaPlant and animal cells
Lesson 10 of 26
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