Choose the correct answer from the alternatives given. Plants that have symbiotic relations with nitrogen-fixing bacteria provide the bacteria with:
A
nitrogen
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B
sugars
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C
nitrites
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D
enzymes
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Solution
The correct option is B sugars Nitrogen-fixing bacteria often live inside the cells of plants, providing nitrogen in exchange for the sugars of photosynthesis. This kind of relationship called endosymbiosis. So, the correct answer is "Sugars".