trees do not fix N2 from air they fix oxygen with the help of N2 fixing bacteria . so trees do not fix N2
Answer:
.40+900=900.40+300=1200.40
Explanation:
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They increase in number and they are more specialized
A carbohydrate is an organic compound such as sugar or starch, and is used to store energy. Like most organic compounds, carbohydrates are built of small, repeating units that form bonds with each other to make a larger molecule. In the case of carbohydrates, the small repeating units are called monosaccharides.