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Why is nitrogen fixation an essential process?
Q12: At the conclusion of meiosis in plants,
Q26: Penguins, seals, and tuna have body forms
Q28: At 5, 10, and 15 hours in
Q38: Among extant vertebrates, a sheet of muscle
Q42: To adjust blood pressure independently in the
Q43: Among these choices, the least reliable indicator
Q50: Cave art by early humans recognized the
Q63: Which of the following are true of
Q67: Movement of phloem sap from a source
Q75: Which of the following is a scientific