NUTRITION
ESSENTIAL NUTRIENTS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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they take nitrogen away from the soil
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they add nitrogen to the soil
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Either A or B
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None of the above
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Detailed explanation-1: -The role of nitrogen-fixing bacteria is to provide plants with nutrients that they cannot acquire from the air. Nitrogen-fixing bacteria perform what crops cannot: they obtain assimilative N. Bacteria absorb it as a gas from the air and release it to the soil, typically as ammonia.
Detailed explanation-2: -Nitrogen is so vital because it is a major component of chlorophyll, the compound by which plants use sunlight energy to produce sugars from water and carbon dioxide (i.e., photosynthesis). It is also a major component of amino acids, the building blocks of proteins. Without proteins, plants wither and die.
Detailed explanation-3: -The bacteria get energy through photosynthesis and, in return, they fix nitrogen into a form the plant needs. The fixed nitrogen is then carried to other parts of the plant and is used to form plant tissues, so the plant can grow.