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16 Cards in this Set
- Front
- Back
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Plants that provide a means for nitrogen fixation to occur are called.....
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legumes
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Typically, legumes are plants that have ____ as their fruits.
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bean pods
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Oceanic organisms that can fix nitrogen into nitrates are called ....
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cyanobacteria or blue-green algae
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Every ecosytem needs to have some organism in it that can....
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fix nitrogen into nitrates
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The air contains about 80% ____, but it is not directly usable by plants and animals.
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nitrogen gas (N2)
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The form of nitrogen that is most easily used by plants as "plant food" is....
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nitrate
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Another nitrogen form, usable by many plants is....
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ammonium
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Organic farmers get nitrogen for their crops in the form of ....
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manure
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Non-organic farmers get nitrogen for their crops in the form of .....
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pelletized, granular man-made, energy expensive fertilzer from the store.
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When organisms die or drop their waste products, they are broken down by _____ which is then released to the soil as nitrates or the air as nitrogen.
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bacteria (ammonifying, nitrifying, and denitrifying)
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Plants absorb nitrates from decomposing organisms and incorporate it in their....
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tissue
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Animals that eat plants are called ____. The nitrogen from those plants becomes ____ in the animal tissue, which contain building blocks called ___ ____.
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herbivores
protein amino acids |
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A very high-energy, non-biological method of fixing nitrogen into nitrates is via ___. Rain mixes with the nitrates and help get it into the soil
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lightning
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Legumes have ___ ___ ___. In them live ___ that do the nitrogen fixation. They live symbiotically with the plant.
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nitrogen fixing nodules
bacteria |
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Animals that get their nitrogen by eating other animals are called.....
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carnivores
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Proteins contain units called _____ _____, each of which contain the element _____.
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amino acid
nitrogen |
