Which of the following statements correctly describe centrioles? Check all that apply.

In the basic animal-cell model, centrioles occur in animal cells and help organize the spindle during cell division; spindle fibers extend from the centrosomes associated with the centrioles. Centrioles are present at other stages of the cell cycle too, so they are not only present during metaphase. Chromosomes are made mainly of DNA and proteins, while centrioles are made of microtubules, so they are not made of the same material.

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