D. Secondary online and layers of periderm
Nitrogen is a major component by which plants use sun energy to produce sugars from water and carbon dioxide. (It is also a major component of amino acids)
The color produced by one milligram of platinum cobalt in one liter of dissolved water is fixed as one unit of color in platinum-cobalt scale.
Answer:
Its B
Explanation:
I took the quiz and choose A, but It was wrong, and the correct answer was B... You're welcome :D