Question

which organelle should be listed under \animal only\ in the diagram?
options: nucleus, centriole, ribosome, cell wall

Explanation:

To determine the organelle under "Animal Only", we analyze each option:

• Nucleus: Present in both animal and plant cells (so in "Both").
• Centriole: Typically found only in animal cells (and some lower plants, but mainly animal - specific for this context).
• Ribosome: Present in both animal and plant cells (in "Both").
• Cell wall: Present only in plant cells (in "Plant Only").

So centriole is the organelle that should be listed under "Animal Only".

Answer:

B. centriole