Symbiosis in Nature
Explore the different types of symbiotic relationships between organisms, including mutualism, commensalism, and parasitism.
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Symbiosis in Nature
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Read each question carefully and answer to the best of your ability. Use complete sentences for short answer questions.
Symbiosis is a close and long-term interaction between two different biological organisms. There are several types of symbiotic relationships, each defined by the nature of the interaction and its effect on the organisms involved.
1. Which type of symbiotic relationship benefits both organisms involved?
Parasitism
Commensalism
Mutualism
Predation
2. In a parasitic relationship, one organism benefits while the other is:
Benefited
Unaffected
Harm
Helped
3. A relationship where one organism benefits and the other is neither helped nor harmed is called .
4. The organism that benefits in a parasitic relationship is known as the .
5. Observe the image below. Identify the type of symbiotic relationship depicted and explain your reasoning.

6. Clownfish living among the stinging tentacles of a sea anemone is an example of mutualism.
True
False
Match the symbiotic relationship with its description.
7. Mutualism
a. One organism benefits, the other is harmed.
8. Commensalism
b. Both organisms benefit.
9. Parasitism
c. One organism benefits, the other is unaffected.