What determines a person's ABO blood group?
The presence or absence of A and B antigens on red blood cells
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General Knowledge of Pakistan
The presence or absence of A and B antigens on red blood cells
The controlled biological decomposition of organic materials into a nutrient-rich soil amendment
Nitrogen and phosphorus
Excessive nutrient enrichment of water that can cause algal growth and oxygen depletion
It absorbs most of the Sun's harmful ultraviolet-B radiation