Here's why:
* Membrane-bound nucleus: Eukaryotic cells have their genetic material (DNA) enclosed within a membrane-bound nucleus. This separates the DNA from the rest of the cell, allowing for more complex gene regulation and organization.
* Organelles: Eukaryotic cells also have specialized internal structures called organelles, each performing specific functions. Examples include:
* Mitochondria: Powerhouse of the cell, responsible for energy production.
* Golgi apparatus: Processes and packages proteins.
* Endoplasmic reticulum: Involved in protein synthesis and lipid metabolism.
* Lysosomes: Break down waste materials.
* Chloroplasts (in plant cells): Site of photosynthesis.
In contrast, prokaryotic cells are simpler and lack a membrane-bound nucleus and most organelles. They have their DNA in a region called the nucleoid, which is not enclosed by a membrane.
Examples of eukaryotic organisms include animals, plants, fungi, and protists. Examples of prokaryotic organisms include bacteria and archaea.