Chloroplasts play an important role in energy production in plant cells. However, some parts of a plant, like the roots, lack chloroplasts. In one to two sentences, explain the most likely pathway for root cells to obtain energy, and identify the organelles involved.

Root cells likely obtain energy through the process of cellular respiration, which occurs in the mitochondria.

In three to five sentences, explain why animal cells do not require a cell wall or a central vacuole for their functions.