Final answer:
Plant cells and animal cells have different structures because they have different jobs or functions.
Step-by-step explanation:
Plant cells and animal cells have different structures because they have different jobs or functions. Plant cells have cell walls that provide structure to the plant and chloroplasts that allow for photosynthesis. Animal cells do not have these structures. Both cells have nuclei and cytoplasm, but the specific structures within the cells differ based on their functions.