The source of the animals food
it is DNA's Code. hope i helps
The answer is exposure. To simplify, the first step in the perceptual process is called exposure and refers to the method of transporting some stimulus in the closeness of a consumer so that it can be detected by one of the five human senses. In addition, the perceptual process is an order of steps that starts with stimuli in the surroundings and ends with an understanding of those stimuli. This procedure is naturally unconscious and occurs hundreds of thousands of times a day. An unconscious procedure is just one that occurs in deprived of consciousness or objective.
There are so many examples for that in different areas, like TPBi experiment carried out in our lab recently.Here's one link: http://www.alfa-chemistry.com/tpbi-cas-192198-85-9-item-282866.htm
The last one because plants move oxygen out to the atmosphere while taking in C02
