* Red blood cells (erythrocytes): These cells lose their mitochondria during development to make room for more hemoglobin, the protein responsible for carrying oxygen.
* Mature plant cells: While plant cells have mitochondria, they are not the primary site of energy production. This role is filled by chloroplasts, which perform photosynthesis.
* Certain parasitic protozoa: Some protozoa, like Giardia and Cryptosporidium, have lost their mitochondria through evolution due to their parasitic lifestyle.
It's important to note that the lack of mitochondria in these cells is a specific adaptation. Most eukaryotic cells require mitochondria for their survival.
