Which of the following relationships does not involve two organisms?
Answer Details
Saprophitism is the relationship that does not involve two organisms.
Saprophitism is a type of relationship between an organism and dead or decaying organic matter. The organism involved in saprophitism is known as a saprophyte or saprobe, and it feeds on dead or decaying organic matter. This type of relationship is important in the ecosystem because it helps to break down dead organic matter and recycle nutrients back into the environment.
In contrast, the other relationships listed - commensalism, symbiosis, and parasitism - all involve two organisms. Commensalism is a relationship in which one organism benefits and the other is neither helped nor harmed. Symbiosis is a relationship in which two organisms live in close association with each other and both benefit. Parasitism is a relationship in which one organism benefits at the expense of the other.
In summary, saprophitism is a relationship between an organism and dead or decaying organic matter, and is the only relationship listed that does not involve two organisms.