Eukaryotic cells are complex cells that contain a nucleus and other organelles enclosed within membranes. They are found in a wide range of organisms, including animals, plants, fungi, and protists. This cellular structure allows for compartmentalization of functions, making eukaryotic cells more efficient than prokaryotic cells, which lack a nucleus.
These cells are characterized by their larger size and more intricate organization. Eukaryotic cells can be unicellular, like yeast, or multicellular, like humans. The presence of organelles such as mitochondria and chloroplasts enables specialized functions, contributing to the diversity of life forms on Earth.