Recessive allele because dominant allele hinders organisms from reproducing which means that there is lesser of it with dominant allele
Physical arousal can facilitate passionate love. It is a naturally occurring and deeply embedded trait found within the DNA of living organisms. The purpose of such is the need to propagate the species in order to ensure its survival in the long run of evolution.
B is the answer you have got to have evidence
Homologies. These determine if there are any similarities. Such as the wings on a butterfly to a bird.