Cytokinins are a class of phytohormones found in large quantities in the root apex, leaves, fruits and seeds. It is noteworthy that the main site of synthesis is in the roots, where they promote root development. Once synthesized in the root apex, this hormone is known to migrate to other parts of the plant via xylem, where it participates in the breakdown of apical dominance, proves cell division, among other functions.
Biosphere. It is the highest level of organization. It is the global ecological system which consists of all the living organisms and other factors which supports life.
I believe this is the only on of the four that deals with post-mortem study of bones, other than a forensic odontologist, who studies teeth and bitemarks, but not bones in general.
