Which of the following statements about essential nutrients are true? Essential nutrients _____
I) are necessary for plant growth and reproduction
II) are required for a specific structure or metabolic function
III) cannot be synthesized by a plant
IV) are produced by symbiotic bacteria
A) I and IV
B) II, III, and IV
C) I, II, and III
D) I, II, III, and IV
Answer: C
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