Multiple Choice
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.
which pair of organisms can be in a parasite/host relationship
D. Organisms are only helped in one, while organisms are only harmed in the other.
Mutualism is a symbiotic relationship in which both organisms benefit, while parasitism is a relationship in which one organism benefits at the expense of the other organism.
The correct answers are:
1. C. commensalism
2. D. parasitism
3. A. mutualism
4. D. Organisms are only helped in one, while organisms are only harmed in the other.
To get the answers to these multiple-choice questions, you need to understand the definitions of the different types of symbiotic relationships.
A. In mutualism, both organisms benefit from the relationship.
B. In predation, one organism (the predator) benefits by consuming or hunting another organism (the prey), which is harmed.
C. In commensalism, one organism benefits without affecting the other organism.
D. In parasitism, one organism (the parasite) benefits while the other organism (the host) is harmed.
Now let's apply this knowledge to the questions:
1. The correct answer is C. In commensalism, one organism is helped while the other organism is neither benefitted nor harmed.
2. The correct answer is D. In this scenario, the heartworm benefits by feeding off the dog's cells, while the dog is harmed.
3. The correct answer is A. In this case, the nitrogen-fixing bacteria benefit by living in protective nodules, while the plant benefits from the converted nitrogen.
4. The correct answer is D. In mutualism, both organisms are helped, while in parasitism, one organism benefits while the other is harmed.