The domain containing all
organisms with eukaryotic cells is the Domain Eukarya. There are only three
domains; the Archaea, Bacteria and Eukarya. Domain Eukarya came from the first
prokaryotic cells billions of years ago.
Can't be gravitational, due to the fact that atoms are way too small to have a gravitational pull for something of similar size.
The strong nuclear force is the answer you're looking for.
Explanation:
They can't tranfuse because they will have an ABO incompatibility reaction. In an ABO incompatibility reaction, your immune system attacks the new blood cells and destroys them
If you have type AB you have both A and B antigens. Therefore you have B too that's why you can't only tranfuse with A after all you have to have to have both types.