Where do sperm get the energy required to keep the flagellum moving?
A. Most of the energy for sperm motility is derived from the metabolism of fructose stored in the nucleus of the sperm. B. Mammalian sperm are photosynthetic. C. Most of the energy for sperm motility is derived from the metabolism of fructose found in vaginal secretions. D. Most of the energy for sperm motility is derived from the metabolism of fructose produced by the prostate gland. E. Most of the energy for sperm motility is derived from the metabolism of fructose carried in the seminal fluid.