The part of a plant cell that cannot be found in an animal cell is the cell wall.

Here's why:

* Cell wall: Provides structural support and protection to the plant cell. It's made primarily of cellulose. Animal cells do not need this rigid structure because they have internal skeletons for support.

* Other differences: While not directly related to your question, plant cells also have chloroplasts (for photosynthesis), a large central vacuole (for storage and water regulation), and plasmodesmata (connections between cells), which are not found in animal cells.