Multiple Choice
Which term best describes a close relationship in which two different species provide a benefit to each other?
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51. Community Ecology
Community Interactions: Mutualism (+/+) & Commensalism (+/0)
Multiple Choice
Which of the following characteristics do commensalism, mutualism, and pathogenicity have in common?
A
They all result in harm to at least one species involved.
B
They all require the exchange of nutrients between species.
C
They all involve interactions between different species.
D
They all provide benefits to both interacting species.
Verified step by step guidance1
Step 1: Begin by defining the three ecological relationships mentioned in the problem: commensalism, mutualism, and pathogenicity. Commensalism is a relationship where one species benefits while the other is neither harmed nor helped. Mutualism is a relationship where both species benefit. Pathogenicity involves one species causing harm to another.
Step 2: Analyze the first option: 'They all result in harm to at least one species involved.' This is incorrect because commensalism does not harm either species, and mutualism benefits both species.
Step 3: Evaluate the second option: 'They all require the exchange of nutrients between species.' This is incorrect because not all interactions involve nutrient exchange. For example, pathogenicity may involve harm without nutrient exchange.
Step 4: Consider the third option: 'They all involve interactions between different species.' This is correct because commensalism, mutualism, and pathogenicity all describe relationships between two or more different species.
Step 5: Assess the fourth option: 'They all provide benefits to both interacting species.' This is incorrect because pathogenicity harms one species, and commensalism does not benefit both species.
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