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Types of Relationships Biology

Commensalism
Commensalism

Commensalism, in biology, a relationship between individuals of two species in which one species obtains food or other benefits from the other without either harming or benefiting the latter.

Competition & Predation
Competition & Predation

They had a competition to see who could sell the most lemonade. Recent Examples of competition from the Web Miss America is ending the swimsuit and evening gown portions of its competition, the organization announced Tuesday morning (June 5).

Mutualism
Mutualism

Mutualism or interspecific cooperation is the way two organisms of different species exist in a relationship in which each individual benefits from the activity of the other. Similar interactions within a species are known as co-operation.

Mutualism: Both Partners Benefit
Mutualism: Both Partners Benefit

Mutualism is a category of symbiosis where both partners of the relationship benefit. The two partners in a mutualistic relationship are evolved together. Since each partner is a component of the environment, the other partner makes use of it.

source: pediaa.com
Parasitism
Parasitism

Parasitism, relationship between two species of plants or animals in which one benefits at the expense of the other, sometimes without killing the host organism.