chickenpox. it may cause shingles later in life
Kenya
Breast milk can typically remain viable in the freezer for up to 6 months before it should be discarded.
No
block answering
No
Thousands of years.
It depends on the animal in question. A viable population will ensure that there are enough individuals to ensure the population will remain in a viable condition for a given period of time. Some scientists hold to the belief that a minimum viable population of 50-500 individuals will ensure the sustainment of the population over time.
Anthrax
Yes, sperm cannot survive once completely dried out. Sperm require a specific environment to remain viable and once dried, they become non-viable.
The finger can be reattached if the veins, arteries and nerves aren't damaged. Rougly 12hours.
depends on the specie, some seeds have to germinate within a few weeks or months or they will die; others can remain dormant for up to 20 years before conditions can be right and they will germinate. there was a instance a while back where a 2000 year old date seed that was found in an archaeological site was successfully germinated
If you mean seed packages, its because seeds are less likely to germinate after the expiration date. Some seeds can remain viable for centuries if they are kept in a cool, dry place, and other seeds are only viable for a shorter period of time.