Explanation:

Living Nature is structured and organised by language and communication within and among organisms. This means that besides human language and communication every organism within its population is competent to use signs with which organisms can differentiate between self and non-self and are able to exchange information concerning common co-ordinations and organisations of single and group behaviour. These sign-mediated interactions are termed biocommunication. It is used to describe specific types of communication within (intraspecific) or between (interspecific) species of plants, animals, fungi and microorganisms.
Biocommunication is used to describe more specific types of communication within (intraspecific) or between (interspecific) species of plants, animals, fungi and microorganisms Biocommunication of animals may include vocalizations (as between competing bird species), or pheromone production (as between various species of insects) chemical signals between plants and animals (as in tannin production used by vascular plants to warn away insects), and chemically mediated communication between plants and within plants.
Plants use Auxin for cell-cell communication.It serves as an extracellular messenger substance to send electrical signals and functions as a synchronization signal for cell division.