Nutrient Cycling MCQs (Quiz 6)

1. Which type of weathering is most dominant in tropical rainforests?

2. Lichens contribute to weathering by ______________________

3. Burning fossil fuels releases large amounts of __________________ gas, directly contributing to the greenhouse effect and global warming

4. Which ecosystem acts as one of the largest natural carbon sinks on Earth?

5. When a plant absorbs nitrates from the soil and uses them to build proteins, this is an example of ____________

6. Which of the following is NOT an agent of nitrogen fixation?

7. What is the correct sequence of products formed during nitrification?

8. Which weathering process directly releases calcium and magnesium ions into soil solution, making them available for plant uptake?

9. The breakdown of rocks into soil particles is an important consequence of _____________

10. Plants mainly absorb water and mineral ions from the soil through their _________________