Motorcycle Brake Pads: Sintered Vs Organic. We all love twisting the throttle to go down the road, but being able to stop your motorcycle is nice too. Brake pads can be one of those things that you keep neglecting over time and think to yourself that youâll get to it later.
The mature sperm cell is slender; in the middle part, the mitochondria are thick and ring-shaped. The DNA in the nucleus is maximally condensed.
Only one sperm nucleus enters the egg. The haploid sperm nucleus fuses with the haploid egg nucleus, and a fertilised egg or diploid zygote is formed. As soon as the sperm has entered the egg, the membrane of the egg changes so that no other sperm can enter. The remaining sperms, which do not fertilise the egg, eventually die. The cilia lining the oviduct sweep the zygote along the oviduct. Peristaltic movements also help move the zygote to the uterus.