Practice Quiz

IB Biology Exam Prep

Category - Biology

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The ocean participates in which of the following cycles:

I. Nitrogen cycle
II. Water cycle
III. Carbon cycle
  1. I only
  2. II only
  3. III only
  4. II and III only
  5. I, II, and II only
Explanation
Answer: E, I, II, and III only. The ocean participates in all three cycles.

Key Takeaway: As the ocean covers two-thirds of the earth, it is not a reach to assume that it participates in the water, carbon, and nitrogen cycle. Since it is comprised of water, its participation in the water cycle is obvious. However, organisms housed in the ocean are also active in the carbon and nitrogen cycles as well.
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