“The function of an organism is the sum result of the sum total of activities and interactions of constituent cells”. Comment.
An oganisms has billions or trillions of cells. Cells performing similar functions are grouped together to form tissue. The different tissue perform different functions. These different activities work together to sustain lie in a multicellualr organisms. Since, the main constituent of the any organism is a cell that is capable of all activities of life, we can say that the functions of an organism are sum total of functions performed by constituent cells.