This field of plant physiology includes the study of all the so-called internal activities connected with plants—those chemical in addition to physical processes linked to life as they will occur in vegetation. This includes examine at many amounts of scale of dimensions and time. In the smallest scale usually are molecular interactions connected with photosynthesis and inside diffusion of water, minerals, and nutritional requirements. At the largest scale are classified as the processes of grow development, seasonality, dormancy, in addition to reproductive control.