This is Mendels Law of Segregation
Humans, when exhaling release carbon which helps them to make sugar, and as a biproduct plants release oxegen which humans inhale.
<span>The grouping of organisms based on their common descent is called evolutionary classification. Through evolution, one species has changed and become modified until it became what it is today. However, some of today's organisms have the same predecessor, which is evident if you take evolution into consideration. </span>