When molecules uses energy for transportation across the cell, then it is known as "Active Transport"
So, option B is your answer.
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Explanation:
methods produce new plants from vegetative parts of the original plant, such as the leaves, stems and roots. These
Answer:
I believe the answer is B
Answer:
Free nitrogen is simply molecular nitrogen (N2). Nitrogen, in its molecular form, consists of two nitrogen atoms bound together with a tripple bond. ... So basically, any nitrogen that is in an organic compound is considered “fixed” nitrogen and N2 is considered to be “free” nitrogen
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