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Find relationship between one of the pairs of organisms in one of the folowing...

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nursrat | eNoter

Posted September 21, 2011 at 8:16 AM via web

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Find relationship between one of the pairs of organisms in one of the folowing situtions.

b) Trichomonas vaginalis and humans

Find relationship between one of the pairs of organisms in one of the folowing situtions. Briefly describe relationship between the pair u have choses. and clasify the relationship as parasitism, commensalism or mutualism.
a) bacteria in the digestive tract of cows
b) Trichomonas vaginalis and humans
c) The leafcutter ant and the basidiomycete fungus
d) Coddidia and dogs

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pacorz | High School Teacher | (Level 3) Educator

Posted September 21, 2011 at 9:11 AM (Answer #1)

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First we should distinguish among the three relationship types we are working with here. All involve two organisms coexisting. In parasitism, one organism benefits while the other suffers as a result of the relationship. In commensalism one organism still benefits, but the effect on the other organism is neutral. In mutualism, both organisms benefit from the relationship, though not necessarily in equal measure.

A) Mutualism. The bacteria get a home and food,and the cow receives nutrition because the bacteria break down cellulose which the cow cannot digest by itself.

B) Parasitism. The protist trichomonas vaginalis gets a home and food, but it can increase a person's risk of being infected by the HIV virus, and can cause babies to be born prematurely.

C) Commensalism. The fungus can survive with or without the ants, but the ants need the fungus for food.

D) Parasitism. The coccidia protozoans get a home and food in the dog's digestive tract, while the dog gets sick from the infection.

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