Prokaryotic cells have a nuclear while eukaryotic cells have a nucleus. Eukaryotes have membrane bound organelles. Eukaryotes have chromosomes while prokaryotes do not. Also prokaryotic cells have circular DNA while eukaryotic cells have linear DNA, or "double helix".
I think the answer is to throw away all uneaten and excess food...etc
The Bering Strait separates Siberia and Alaska.