What is a key feature of eukaryotic cells?

Eukaryotic cells are characterized by their complex structure, which includes a variety of organelles that perform specialized functions. This complexity is a distinguishing feature compared to prokaryotic cells, which are generally simpler and lack membrane-bound organelles. The presence of a true nucleus, where the cell's genetic material is housed, is central to the classification of eukaryotic cells. Additionally, the organelles within eukaryotic cells, such as mitochondria, endoplasmic reticulum, and Golgi apparatus, contribute to the cell's ability to carry out a wide range of biological processes efficiently. This complexity allows for greater specialization and function within eukaryotic organisms, which can be unicellular or multicellular.