Nitrogen Fixation: Root and Bacteria Interactions. Nitrogen is an important macronutrient because it is part of nucleic acids and proteins. ... The most important source of BNF is the symbiotic interaction between soil bacteria and legume plants, including many crops important to humans.
Answer: Option D.
It is an evidence -based report.
Explanation:
An evidence based report is a report that is written based on scientific evidence to draw out conclusion or arguments for guidance and decision making for the people.
The article that was written, was base on some scientific proof that vegetables lack some nutrients. The vegetables have been analyzed and the constituents have been known. Conclusion was arrived at the Americans need to take dietary supplements to meet up with the daily nutrients requirements while taking vegetables.
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Answer: A. Make A Guess
Explanation: A hypothesis is a statement you test, first you have to come up with an idea or theory to test, which would then become your hypothesis.
