Final answer:
The ER, mitochondria, and Golgi apparatus have specific functions within a cell.
Step-by-step explanation:
The endoplasmic reticulum (ER), mitochondria, and Golgi apparatus are all structures within a cell that have specific functions. The ER is responsible for protein synthesis and modification, and the rough ER, which is covered with ribosomes, is involved in protein synthesis.
The smooth ER is involved in lipid synthesis and detoxification. Mitochondria are the powerhouses of the cell, producing energy through cellular respiration. The Golgi apparatus is involved in packaging, modifying, and transporting proteins.