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Parasitism involves one organism (parasite) living off of another (host) in a harmful manner but without killing the host. Predation involves one organism (predator) killing another (prey) for food.

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What is permanent close association between two or more organisms of different species?

Symbiosis is the permanent close association between two or more organisms of different species. It can involve mutual benefit (mutualism), one organism benefiting at the expense of the other (parasitism), or one organism living on or in another without harming it (commensalism).


What is symbiosis?

Symbiosis is a close, prolonged association between two (or more) organisms of different species that may, but does not necessarily, benefit each member. The specific biological interactions of symbiosis can be subdivided in three: * Mutualism, where both organisms benefit. * Commensalism, where only one of them benefits, but the other is not affected. * Parasitism, where one benefits and the other organism is harmed.


Three types of symbiosis?

The three types of symbiosis are... Mutualism: A relationship in which both species benefit. Commensalism: A relationship in which one species benefits and the other species is neither helped nor harmed. Commensalism is not very common in nature because two species are usually either helped or harmed a little by any interaction. Parasitism: A relationship that involves one organism living on or inside another organism and harming it. The organism the benefits is called a parasite, and the organism it lives on or in is called a host. The paraite is usually smaller that the host. In a parasitic relationship, the parasite benefits from the interaction while the host is harmed. Unlike a predator, a parasite does not usually kill the organism it feed on. If the host dies, the parasite loses its source of food.


What do parasitism mutualism and commensalism have in common?

Parasitism, mutualism, and commensalism are all types of symbiotic relationships where two different species interact with each other in a particular way. In parasitism, one species benefits at the expense of the other. In mutualism, both species benefit from the interaction. In commensalism, one species benefits while the other is neither helped nor harmed.


In what type of symbiosis is does one organism benefit and the other is harmed?

Parasitism is what happens when one organism benefits and the other is harmed. For example, think of fleas on a dog. The fleas are parasites because they are benefiting from living on the dog, but the dog is being harmed by the fleas.