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10 Cards in this Set
- Front
- Back
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Plants usually obtain nitrogen by absorbing _____________ or _________ through their ________.
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nitrate ions or ammonium through their root
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Nitrogenous compounds may be added to the soil from:
-____________ -____________ -____________ -____________ -____________ |
- artificial fertilisers
- weathering of rocks - acid rain - lightning |
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Nitrogenous compounds taken up by plants are ___________ into nitrogen containing tissues such as ___________ and into molecules such as __________.
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ASSIMILATED into nitrogen tissues such a lignin. Molecules such as CHLOROPHYLL
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_____________ obtain their nitrogen by eating plants. ___________ obtain ther nitrogen by eating _________(that eat plants).
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HERBIVORES get nitrogen from plants
CARNIVORES get nitrogen from HERBIVORES |
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NITROGEN FIXATION
Nitrogen fixation is conversion of __________ into _________, carried out by fixing bacteria such as _____________ & _____________. |
NITROGEN GAS into AMMONIA. Carried out by fixing bacteria such as RHIZOBIUM and AZOTOBACTER.
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NITROGEN FIXATION
___________ is present in root nodules of __________ plants. ____________ occurs in aerobic, _____ soils. ________________ occurs in anearobic soils. _______________ occurs in wetlands. |
RHIZOBIUM is present in root nodules of LEGUMINOUS plants.
AZOBACTER occurs in aerobic, AERATED soils. CLOSTRIDIUM is present in anearobic soils. CYANOBACTERIA occur in wetlands |
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NITRIFICATION
_________ of dead plants/animals and their waste releases ____________ into the __________. ____________ transforms ammonia into NITRITE ions. ____________ transforms ammonia into NITRATE ions |
DECOMPOSITION of dead organisms resleases AMMONIA into the soil.
NITROZOMAS transforms ammonia into NITRITE ions. NITROBACTER ---> NITRATE ions. |
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DENITIRFICATION
Denitrifying bacteria utilize _________ as an energy source and convert back into ______/_________ |
NO3-
N2/N2O |
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Nitrogen fixation is the:
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conversion of nitrogen into ammonia.
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Nitrification is the:
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~NH3->NH4->NO2-->NO3-
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