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17 Cards in this Set
- Front
- Back
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N-fixation
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atmospheric n2 is changed into usable nitrogen compounds
-fixed into a usable form |
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assimilation
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fixed nitrogen becomes part of plant tissue
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bacteria
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an organism lacks organelles
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fertilizer
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compounds that put usable forms nitrogen into the soil
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legume
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plants (usually those with pods) that can fix nitrogen
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denitrification
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conservation of nitrate into N2
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sink/reservoir
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a place where nutrients are absorbed from environment and stored
-biomass is always a reservoir |
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source
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any activity that releases nutrients back into the environment
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releasing agent
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a chemical used to prevent other material from bonding onto surfaces
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nutrient
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any substance an organism needs to survive
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limiting nutrient
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a nutrient that is in short supply
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biogeochemical cycle
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matter cycles through life and earth through this
-bio=life -geo=earth -chem=matter |
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autotroph
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they make their own food inorganic molecules and draw raw minerals from ground or other media
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heterotroph
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they eat other autotrophs with internal digestion or decomposition and absorption with external digestion
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leaching
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nutrients seep deep into ground, preventing them from being absorbed by plants
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decay
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decomposers
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CHNOPS
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carbon
hydrogen nitrogen oxygen phosphorus sulfer |
