Answer:
pheromones.
Explanation:
These are chemical compounds in insects and mammals that once released and transported by diffusion are capable of eliciting social response among organisms of the same species. Their release usually induced a significant effects on both the physiological and behavioural response in the recipients with no intermediate effects. Therefore, they are usually categorized based on the type of responses they produced in the receiving organisms.
Examples include, responses for territoriality, to trial paths, to raise alarm, for sex etc.
Based on this they may produce aggressive behaviours thus known as alert pheromones, sexual display( sex-pheromones) etc, specifically, The behavioural triggered pheromones are known as Releasers , while physiological induced pheromones are known as Primers
Their locations varies , in animals the secretory glands can be found around the anus, under the skin deposits, close to the eyes, chin patches etc.
Their chemical structure is made up of unsaturated esters,aldehyde, and alcohols.
