Final answer:
The statement that cells have individual parts contributing to overall cell function is true, where subcellular components like the plasma membrane, cytoplasm, ribosomes, and DNA play crucial roles.
Step-by-step explanation:
The statement that cells have individual parts that contribute to the function of the cell as a whole is true. Cells are the smallest independently functioning units in living organisms. Each cell is equipped with subcellular components such as the plasma membrane, cytoplasm, ribosomes, and DNA. These parts are essential for the cell to carry out its necessary functions. For example, the plasma membrane controls the entry and exit of substances, the cytoplasm holds the components of the cell, the ribosomes are responsible for protein synthesis, and DNA contains the genetic instructions. All these parts work together, allowing the cell to function properly within the larger context of tissues, organs, and organ systems.