Final answer:
Sperm cells and muscle cells require greater amounts of energy than other cells because they have a higher concentration of mitochondria, which produce energy through cellular respiration.
Step-by-step explanation:
Sperm cells and muscle cells require greater amounts of energy than other cells. One common characteristic of these two cell types is the presence of mitochondria.
MITOCHONDRIA are organelles known as the powerhouses of the cell because they produce most of the cell's energy through a process called cellular respiration. Cells that require large amounts of energy, such as sperm cells and muscle cells, have a higher concentration of mitochondria.