(4) People who have the O blood type possess no enzymes capable of attaching N-acetylgalactosamine or galactose on RBC membrane glycolipids at the end of the oligosaccharide chain. It’s the people with AB blood type who can possess enzyme with that capability.
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Cloning human cells, and growing bacon.
Im not really sure what you mean by this but, from what I get, we all humans, animals, and plants need oxygen and food to survive. tree are very important cause we need them to give us oxygen, and we need animals or plants to have food. Hope this is what you were looking for.