Question

the structure in the diagram numbered #13 is only found in animal cells (not plant cells), it helps cells to divide. nucleus centriole mitochondria chloroplast

Explanation:

Centrioles are organelles found only in animal cells and play a role in cell - division. Nucleus is present in both plant and animal cells. Mitochondria are also present in both. Chloroplasts are only in plant cells.

Answer:

B. centriole