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Exam Lesson Name: Evolution and the Diversity of Life
Exam number: 355339RR
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Question 20 of 20 :
Select the best answer for the question
20. Arbuscular mycorrhizae, which are obligate mutualists, are found in about 70% of all plant species. What are the primary benefits that the fungus and the
plant offer each other?
O A. The fungus provides nutrients like carbohydrates to the plant, and the plant provides minerals like phosphorus to the fungus
O B. The fungus prevents other organisms from infecting the plant, and the plant provides oxygen to the fungus
O C. The fungus provides minerals like phosphorus to the plant, and the plant provides nutrients like carbohydrates to the fungus.
O D. The fungus provides oxygen to the plant and the plant prevents other organisms from infecting the fungus
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The correct answer is C. The fungus provides minerals like phosphorus to the plant, and the plant provides nutrients like carbohydrates to the fungus. Since the plant is a photosynthetic organisms it has carbohydrates to offer. On the other hand, the network distribution of fungi's hiphae, allow it to gather minerals along the soil.

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