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Nature & Animals

Which outcome occurs when a plant supplies carbohydrates?

A)Enhanced nitrogen fixation rate occurs
B)Reduced root respiration is observed
C)Decreased phosphate uptake results
D)Diminished microbial competition prevails

💡 Explanation

Enhanced nitrogen fixation occurs because plants supply carbohydrates to symbiotic bacteria through a mutualistic association known as mycorrhizae; this carbohydrate transfer fuels the nitrogenase enzyme. Therefore fixation increases, rather than decreasing phosphate uptake.

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