1. In the positive feedback system, the stimulus is enhanced by the output of the feedback system. For example – child birth is a positive feedback in which oxytocin released during the labor intensifies the contraction and ripening of fruit.
2. In the negative feedback system, the stimulus is dampened by the output of the feedback system. For example – Regulation of blood glucose levels and osmoregulation.
There were more dark moths around factories because trees were darker near factories because of pollution. More light moths were found in the country away from the factories, in the forests with no factory pollution
