Butter will keep for a long time refrigerated. Up to 6 weeks. You can also freeze this product and it will keep for over a year.   Hi - I only accessed this question as I hâ¦ave just tried some butter I had in the fridge. It is now Sunday 14th June 2009.
Sperm can be stored inside the male body for approximately 3 weeks after they've matured, after which they die inside the body if not ejaculated. So the entire sperm life cycle inside a man's body if not ejaculated (10 week maturation time + 3 week storage lifespan) is approximately 13 weeks or about 3 months.
A sperm cell contains a nucleus, which is the head part, and the mitochondria are in the 'neck' section. When a sperm fuses with an egg, the part containing the mitochondria is left on the outside and the newly formed embryo contains on ly the mitochondria from the egg, i.e. from the mother. Source(s): Kate Â· 9 years ago.