The organelle that is not found in plant cells is the centriole.

Here's why:

* Centrioles are involved in the formation of microtubules, which are important for cell division in animal cells.

* Plant cells have a different mechanism for cell division that doesn't rely on centrioles. They use microtubules organized by a structure called the microtubule organizing center (MTOC), which is not the same as a centriole.

Let me know if you have any other questions!