If you own a dog, each year, depending on the region where you live, you will need to buy

medication that treats roundworms and ticks and fleas. These organisms live either internally
or externally on dogs and obtain all their nutrients from the dog. In some cases, dogs are
harmed due to these interactions. This describes a __________ relationship.



a. commensal
b. mutualistic
c. parasitic
d. tertiary


C

Biology & Microbiology

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Why has it been difficult to generate drugs to treat AIDS?

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Which of the following infectious diseases currently tops the list of bioterrorist threats?

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In plants and some fungi, individuals that form the diploid generation are called ____

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Biology & Microbiology