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11 terms

biology chapter 14

key words for chapter 14
the total mass of living matter in a given unit area
Carbon cycle
the organic circulation of carbon from the atmosphere into organisms and back again
cellular respiration
process of converting chemical energy of food in to a form usable by cells, typically ATP
Nitrogen cycle
the transfer of nitrogen from the atmosphere to the soil, to living organisms, and back to the atmosphere
Phosphorus cycle
Cyclic movement of phosphorus in different chemical forms from the environment to organisms and then back to the environment
Primary consumers
herbivores that obtain chemical energy by consuming organic matter made by producers
Photosynthetic organisms and chemosynthetic bacteria that, given a source of energy, can build organic matter from simple inorganic substances
Secondary consumers
Organisms that obtain chemical energy by eating primary consumers
Tertiary consumers
organisms that consume the organic matter of seconday consumers
Trophic level
refers to the feeding level of organisms in an ecosystem
Water Cycle
cyclic process by which water moves between parts of the biosphere