Not all mixtures are solutions. It has to be a special homogeneous bond mixture composted of two or more substances
There are a variety of eubacteria living as decomposers, heterotrophs, pathogens, and autotrophs.
Answer:
If the child has blood type OO and his mothes has AO type, the father must have O in his genotype: A(AO), B(BO), O(OO). The male phenotype AB exclueds him as father.