Why are astrologers not considered to be a scientist

Astrologers do not use methods that are accepted as a scientifical at this moment. I mean, methods that give us enough controll over the variables, eg, we cannot proove that person's agression is connected or caused by his/her Mars placement, and not by the environment, family agression, mental disorder etc.

this is true, assuming that the allele is completely recessive and incomplete dominance is not a factor.

answer: substrate concentration. enzymes work best when there is a high enough substrate concentration for the reaction they catalyse.