In a multicellular organism, different cells are specialized for certain functions to help the whole organism maintain the livin
g state. As cells differentiate to become specialized, the abundance of different organelles shifts to best serve those needs. Which organelle might be expected to be present in high abundance in a mammal's muscle cells that must extract large amounts of energy from food molecules to support the work of muscle contraction?
Well the only organelle that produces ATP/cellular energy is the mitochondria so via process of elimination you would conclude mitochondria are most abundant in muscle cells.