Of the main nutrients in the biosphere, the one that is "fixed" inside nodules in certain plant roots is_____ .
A) oxygen
B) nitrogen
C) carbon
D) calcium
E) hydrogen
Correct Answer:
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Q15: _The Linnaean system of classification is .
A)
Q16: In which type of environment does the
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Q19: Which of the following is NOT an
Q20: Which of the following terms is the
Q21: At almost any scale, the most prominent
Q22: The textbook concludes_ .
A) no one knows
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A) be
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