The connecting piece of a sperm is packed with gonads that produce energy.
Sperm is the male reproductive cell and is derived from the Greek word "Sperma" Significance is Root.
Sperm cannot divide and have limited life span, but after fusion with egg cells through fertilization, a substitute orgasm begins developing, starting as a totipotent zygote
A water wave should be the answer.. if not then electromagnetic is the closest thing to being correct..
<span>When a bone breaks your body immediately begins working to heal it. Within the first hours of a fracture a blood clot forms around the break and special cells call phagocytes begin cleaning germs from the bone fragments. Then, a soft callus composed of collagen is created around the break. Next, a hard callus forms as osteoblast cells work to create new bone to aid in the reconstruction process. After all is said and done the bone is remodeled by cells called osteoclasts. The bone will be completely rebuilt in 3-9 years.</span>
Biogeographic isolation : Isolation through distribution of Species in geographic space and time
so , one of the answer is The isolation of two populations of the same species
By doing this, decrease the chance of any cross breeds between species, which eventually will led to Speciation