All of the following are examples of symbiotic relationshipsexcept A. algae and

Question

All of the following are examples of symbiotic relationshipsexcept A. algae and fungi living together as a lichen. B. the protozoa that live in the intestine of termites anddigest cellulose that termites cannot digest. C. the mosquito that visits a mammal for a blood meal. D. the malaria parasite that lives in the liver ofhumans. Would this be D. since malaria is likely to kill humans? Iread something about the host not being killed directly by therelationship, but is instead weakened by it so I thought this wouldexclude D. All of the following are examples of symbiotic relationshipsexcept A. algae and fungi living together as a lichen. B. the protozoa that live in the intestine of termites anddigest cellulose that termites cannot digest. C. the mosquito that visits a mammal for a blood meal. D. the malaria parasite that lives in the liver ofhumans. Would this be D. since malaria is likely to kill humans? Iread something about the host not being killed directly by therelationship, but is instead weakened by it so I thought this wouldexclude D.

Explanation / Answer

I believe the answer is C.  First of all symbiosis is a term applied to 2 species that live together in close contact during a portion of their lives, and it can be mutualistic or parasitic, hence symbiosis can be good or bad.  The fact that the mosquito only "visits" the mammal, means that it is in contact for only a short period of time, so it cannot be symbiosis.

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