Ch. 2 Principles of Ecology Review (Biology)
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| Place in which an organism lives; spends majority of it's lifetime | Habitat
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| The presence of interbreeding individuals in one place at a given time | Population
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| A group of biological communities that interact with the physical environment | Ecosystem
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| Converting nitrogen from a gas to a solid/usable form by bacteria | Nitrogen fixation
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| The movement of chemicals on a global scale from abiotic through biotic parts of the environment | Biogeochemical cycle
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| Largest level of ecological organization | Biosphere
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| Smallest level of ecological organization | Organism
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| The wind blowing through branches is what type of factor in that environment? | Abiotic
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| The caterpillar eating the trees leaves is what type of factor in that environment? | Biotic
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| The process of pollination demonstrates what type of symbiotic relationship? | Mutualistic
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| What type of heterotroph is a snake? | Carnivore
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| How does ALL energy first enter an ecosystem? | Sun
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| Where is the largest concentration of nitrogen on earth found? | Atmosphere
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| A group of individual organisms of the same species is known as a(n) | Population
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| The study of interactions among organisms and their environment | Ecology
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| Collect energy from the sun; storing it for other organisms | Autotrophs
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| Act of one organism consuming another | Predation
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| Allows a scientist to represent or simulate a process or system | Model
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| Close relationship that exists when two or more species live together | Symbiotic relationship
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| Group of interacting populations | Biological community
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| Large group of ecosystems that share the same climate and have similar types of communities | Biome
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| Living factors in an organisms environment | Biotic factors
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| Nonliving factors in an organisms environment | Abiotc factors
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| Occurs when more than one organism uses a resource at the same time | Competition
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| Portion of the earth that supports life | Biosphere
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| Great examples of mutualistic relationships in nature; algae and a fungi | Lichens
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| Food chains and food webs represent what kind of data? | Qualitative
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| Ecological pyramids represent what kind of data? | Quantitative
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| Part of all organic compounds; major component of living things | Carbon
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| Inorganic nutrients ___ through the environment due to flow of energy in ecosystems | Cycle
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| Nutrient needs by organisms to produce proteins | Nitrogen
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| The current in the stream a salmon is swimming up to spawn is what time of factor in its environment? | Abiotic
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| Most life on earth is found where? | Northern hemisphere
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| Relationship in which one organism benefits and the other is unharmed/unaffected. | Commensalism
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| Type of relationship in which one organism benefits at the expense of the other | Parasitism
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| Ability to cause change; cannot be created or destroyed, simply transformed | Energy
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| Model which shows the many ways energy can flow through organisms | Food web
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| Simplified model representing the transfer of energy from organism to organism | Food chain
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| Each step in a food web or food chain | Trophic level
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| Eat fragments of dead matter int he ecosystem and return nutrients to the soil, air and water | Detritivores
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| Release enzymes to digest organic material around them and absorb the simplified nutrients | Decomposers
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| Anything that has mass or takes up space | Matter
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| Chemical substance that an organism must obtain from it's environment in order to sustain life | Nutrient
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| Total mass of living matter at each trophic level; decreases at each level | Biomass
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| Studies water processes, such as distribution in nature, water flow in a dam or river, etc. | Hydrologist
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| All organisms on earth rely on ___ water | Fresh
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| Bacteria in soil convert fixed nitrogen compounds back into nitrogen gas which returns to the atmosphere | Denitrification
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| Element that is essential for the growth and development of organisms; may be locked up in short or long term cycles | Phosphorous
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