Final answer:
In a spermatozoan, the mitochondria provide the energy required to move the tail.
Step-by-step explanation:
In a spermatozoan, activity in the mitochondria provides the energy required to move the tail. Mitochondria are known as the power plants of the cell because they produce ATP, the cell's energy source. Sperm cells and muscle cells, which require a lot of energy, have a greater number of mitochondria.