The major source of free oxygen that supports life on Earth is the ________.
Correct Answer:
Verified
Q2: Nitrogen can be returned to the atmosphere
Q3: Nitrogen is generally available to plants in
Q4: Some nutrients are _ from the soil
Q5: Nearly all of the phosphorus in terrestrial
Q6: Which of the following cycles have particles
Q7: Large quantities of nutrients are bound tightly
Q8: In aquatic ecosystems,the phosphorous cycle moves through
Q9: Biological nitrogen fixation is accomplished by symbiotic
Q10: Precipitation brings appreciable quantities of nutrients into
Q11: In ecosystems,internal cycling is dominated by
A)global nutrient
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