does the color of light affect cellular activities?
The objective of the experiments would be to observe the activities of cells while they are exposed to different color lights. The activities of interest should be related to energy-producing or energy-using functions (metabolism), rather than cell division activity (mitosis). The experiment should cover a period of at least one cycle of each biorhythm. The procedure would ideally illuminate the primitive endoderm, mesoderm and ectoderm cells from a gastrula, with red, yellow and blue light, respectively. Or, the cells may be obtained from more mature tissues and organs that evolve from those primitive three cells (e.g., gut lining cells; muscle or blood cells; epidermis or nervous system cells; respectively). Preferably the experiments should run concurrently on the different cell types, to assure that external environmental conditions are the same for all three cell types. It may turn out that the experiments must be observed during in vivo cellular activity, since in vitro activity
