Infecting organisms travel from one person to another through saliva and bodily fluids, and some are airborne.
Energy transfers from one organism to another by organisms eating other organisms in a food chain or web.
by hunting one another helping one another and even decomposing one another
Out of these, AIDS is the least dangerous one. AIDS require a fairly solid exchange of body fluids before infecting another person while the other two can spread much more easily.
Living organisms depend on one another and on their environment for survival.
The sun, one way or another. The sun, one way or another.
The term "when one person surpasses another" means that one person has overtaken another. It also means that one person does something better than another.
No, unless that person has a cut or bleeding gums, and you swallow it. HIV/AIDS is transmitted through the exchange of bodily fluids of one person to another. I would imagine your stomach acid would kill/prevent the virus from infecting you. There is a "condom in a pill" that is FDA approved, Truvada.
Symbiotic
migration
Organisms in the same genus are most closely related to one another according to Linnaeus's groupings.
The study of how living and extinct organisms are related to one another is simple. This study is called evolution.
Energy transfers from one organism to another by organisms eating other organisms in a food chain or web.