Why do sperm cells need energy?

Explanation: Locomotion requires energy and this energy can be supplied by mitochondria which can carry out the process of respiration. The sperm’s midpiece contains many mitochondria so that supply of energy is available for the sperm to perform its function of traveling to and later fertilizing the egg.

the cladogram shown here shows similarities and differences among several classes of vertebrates. anatomically, the four have limb structure as their common ancestor. we might separate the mammals from the other three classes because they a) divergent; do not lay eggs b) identical; are warm-blooded c) varied; a four chambered heart d) homologous; have mammary glands