The exchange of signals and communication in reaction on the change of external factors are a basic phenomenons of biological systems. Communication occurs at different levels starting at the molecular level up to the organism in its environment. Communication and interaction are investigated by bioloigsts and theoretical physisists.
Many experiments indicate a non linear character of the processes involved.
Communication at the cellular level and in tissues 2. Communication and interaction of organisms and communities 3. Gas vesicle formation in Halobacterium salinarium.