True or False: Centrioles are required for spindle formation in all eukaryotic cells.

Explanation

False. Most higher plants do not have centrioles, yet they still form spindle fibers during mitosis. The spindle forms without centrioles - and without the aster formations seen in animal cells. Centrioles are present in animal cells and play a role in organizing the spindle, but they are not universally required for spindle formation in all eukaryotes.