The presence of membrane-bound organelles in eukaryotic cells is a key characteristic indicating their relatedness.
All eukaryotic cells possess membrane-bound organelles. This characteristic provides evidence that all eukaryotic cells are related because the presence of membrane-bound organelles is a defining feature of eukaryotic cells. These organelles, such as mitochondria, endoplasmic reticulum, and Golgi apparatus, perform specific functions within the cell, indicating a shared evolutionary history.
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