The cell structure found in plant and bacterial cells but not animal cells is called a cell wall.

Here's why:

* Plant cells: The cell wall provides structural support and rigidity to the plant, allowing it to grow tall and withstand internal pressure from water uptake. It's primarily composed of cellulose.

* Bacterial cells: The bacterial cell wall provides shape and protection from the environment. It's composed of peptidoglycan, a unique molecule found only in bacteria.

* Animal cells: Animal cells lack a rigid cell wall. They rely on their cytoskeleton for structural support and have flexible cell membranes.

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