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16 Cards in this Set
- Front
- Back
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What happens to N2 gas in the air
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Fixed by nitrogen fixing bacteria and is converted to nitrates
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What happens to the nitrates fixed by bacteria?
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absorbed by plants
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What are the two things that happen to the plant that has absorbed the nitrates
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1) It will be eaten by animals and the nitrates will pass on to them.
2) It will die |
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How do animals return nitrates to the ground
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Excretion and death
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What happens to animal waste and dead animals and plants?
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Fungi and decay break them down producing ammonia
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What happens to Ammonia in the cycle
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Nitrifying bacteria turn it into nitrites
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What is the function of the nitrogen cycle
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To take nitrogen from the air and make it available for use by living things
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What is nitrogen fixation
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The conversion of nitrogen gas into ammonia, ammonium or nitrate
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What is nitrification
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the comversion of ammonia and ammonium compounds to nitrite and then to nitrate
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what is denitrification?
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the conversion if nitrates to nitrogen gas
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What does decomposition release back into the soil
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ammonia
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what does chemosynthetic mean
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they make their own food using energy from chemical reactions.
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True or False: Nitrifying bacteria are chemosynthetic
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True. Nitrifying bacteria are chemosynthetic.
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What happens to some of the nitrate in the soil
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it is absorbed and assimilated by plants
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Are denitrifying bacteria aerobic or anaerobic
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anaerobic. they live in swampy soil or deep down in the soil
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What carries out denitrification
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denitrifying bacteria
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