--subdivision Physiology under individual plants and groups of plants, e.g. Corn--Physiology; Trees--Physiology; and under plant organs, e.g. Fruit--Physiology; Roots (Botany)--Physiology
--subdivision Molecular aspects under individual diseases, e.g. Cancer--Molecular aspects; and subdivision Diseases--Molecular aspects under individual organs and regions of the body, e.g. Heart--Diseases--Molecular aspects
