I’m pretty sure A can receive A and O. O is a universal blood type that can donate to any other blood type. This is because O blood does not have signal proteins surrounding it, so blood cells from other blood types do not attack the O blood cells. A can also receive A, because the A proteins recognize the other A proteins.
I believe the answer is answer D- Nuclear decay rates are constant.
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Answer:
No. Gender traits in humans are largely determined by biophysical processes.
If i'm wrong, i'm rlly rlly sorry!!
This would be topoisomerase.