Why is type O negative blood considered the universal red blood cell donor?

Cedure,© data: rmativetable 1: positive and negative results when imacromoleculeregative results when testing for the presence of macromoleculeschemical test | positive test result negative tcarbohydrates – simplesugarse negizitivecarbohydrates – 2: results for the presence of macromolecules in the evidence sample

Explain how organisms could be harmed by high levels of salt from roadways?

In sheep, the allele for belly fur (a) is dominant to the allele for no belly fur (a). a mother with the genotype aa and a father with the genotype aa produce an offspring.