Dried yeast should keep for about a year in the freezer if kept in airtight packaging.
many packets of vacuum packed dried yeast can last for years
I have had yeast last in the freezer for a year or more, but the recommended life of frozen yeast is six months.
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Because yeast is actually made up of living microorganisms. Keeping the yeast refrigerated keeps the yeast inactive, which means that it will still be fresh and able to make your bread rise when you take it out. If you keep the yeast at room temperature, it will die off more quickly and not last nearly as long. (Even in the freezer, yeast doesn't last forever, though.)
3 days.
Indefinately often
7 years
Blackberries (the fruit) will last about three months.
I don't know, but it'll last for a long time in the freezer.
Butter can last up to 12 months in the freezer. See Related Links.
Yes, but make sure it is in the refridgerator. If you are saving it for a long time, pop it in the freezer.
3 months
about 2 days
uncooked can lost for one week to ten days in deep freezer