Multiple Choice

Question

In which type of symbiotic relationship is one organism helped while another organism is neither benefitted nor harmed?
A. mutualism
B. predation<--
C. commensalism
D. parasitism
Heartworm is a type of worm that enters a dog’s body through a mosquito bite. It produces offspring that lodge in the dog’s arteries and feed off of surrounding cells. Which type of relationship is this?
A. mutualism
B. predation
C. commensalism
D. parasitism<-----
Nitrogen-fixing bacteria live in protective nodules (bumps) on the roots of some plants. These bacteria are able to convert gaseous nitrogen from the air into a form of nitrogen that the plants can use. Which type of relationship is this?
A. mutualism
B. predation
C. commensalism<----
D. parasitism
How do mutualism and parasitism compare?
A. At least one organism is helped in both cases.
B. At least one organism is harmed in both cases.
C. Organisms are only harmed in both cases.
D. Organisms are only helped in one, while organisms are only<----- harmed in the other.

Answer 1

Only agree with your second answer. Look up each of the terms

Answer 2

which pair of organisms can be in a parasite/host relationship