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Nutrient Cycles Review
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by Daniela Rios
| 4 Questions
1
1 pt
What is the role of the carbon cycle?
2
1 pt
How have human activities affected the carbon and nitrogen cycle?
3
1 pt
Volcanic eruptions add carbon dioxide to the atmosphere. Which of the following also adds carbon dioxide directly to the atmosphere? **Check all right answers!
Burning a forest
Photosynthesis
Combustion of fossil fuels
Evaporation of a puddle
4
1 pt
Which of the following roles/jobs do nitrogen-fixing bacteria serve (have) in the nitrogen cycle?
They absorb nitrogen from the atmosphere.
They absorb nitrogen from the wastes of animals.
They release nitrogen from the wastes of animals.
They release nitrogen from the bodies of decaying organisms.
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