Answer:
because they can donate blood to anyone
Explanation:
According to natural law moral theory, the moral standards that govern human behavior are, in some sense, objectively derived from the nature of human beings and the nature of the world. While being logically independent of natural law legal theory, the two theories intersect.
If two heterozygous parents mate, the phenotypes of the resulting offspring will be 75% dominant and 25% recessive
The brain stem is the answer that you are looking for