Final answer:
The cells of the adult fruit fly have different structures and functions because they have specialized structures for specific functions.
Step-by-step explanation:
The cells of the adult fruit fly have different structures and functions because they have specialized structures for specific functions.
Each cell in the fly's body is designed for a specific task, which is partly based on its structure.
For example, a muscle cell is very different from a liver cell, and they have different structures to carry out their specialized functions.