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What is the primary role of decomposers in the nitrogen cycle?
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35. Soil
Nitrogen Fixation
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In root nodules, the plants provide __________, and the bacteria provide __________.
A
an aerobic environment; fixed nitrogen
B
amino acids; ATP
C
carbohydrates; nitrogen gas
D
ATP; nitrogen gas
E
carbohydrates; fixed nitrogen
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Understand the symbiotic relationship between plants and bacteria in root nodules. Plants and bacteria work together to benefit each other.
Recognize that plants provide carbohydrates to the bacteria. Carbohydrates are produced by the plant through photosynthesis and serve as an energy source for the bacteria.
Identify that bacteria provide fixed nitrogen to the plants. Bacteria in root nodules convert atmospheric nitrogen (
) into ammonia (
), a form of nitrogen that plants can use for growth.
Consider the mutual benefits: plants receive essential nutrients in the form of fixed nitrogen, while bacteria receive carbohydrates for energy.
Conclude that the correct answer is 'carbohydrates; fixed nitrogen', reflecting the exchange of resources between plants and bacteria in root nodules.
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