Which of these substances is /are not important in the life cycle of plants? I. N₂ II. He III. H₂O IV. CO₂ A) I only B) II only C) II and III D) I and II E) I, III, and IV

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Quizplus · Accepted Answer

Only He (helium) is not important in the life cycle of plants. The other substances listed are all important in various processes such as photosynthesis (CO2), respiration (O2), and various nutrients (N, S, P).

Which of These Substances Is /Are Not Important in the Life