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Definitions Unit 1

TermDefinition
Abiotic Factor A non- living factor
Anabolism Chemical reactions where smaller molecules are joined together to form larger molecules
Biology The Study of living things (organisms)
Biosphere Part(s) of earth that supports life
Biotic Factor Living (organism’s influence on another organism)
Carnivore An animal that feeds on animals only
Catabolism Chemical reactions where larger molecules are broken down to smaller molecules
Cell Basic structural unit of a living organism (that possesses its characteristics)
Climatic Factor Factors relating to long term weather conditions [which affects the distribution of organisms in an ecosystem]
Competition When 2 or more organisms fight for a resource that is in short supply.
Conservation The wise management of the environment or organisms
Contest Competition An active physical confrontation between 2 organisms in which only one wins the resource
Continuity of life The ability of organisms to exist from one generation to the next
Control Standard for comparison
Data Measurements or observations or information gathered from an experiment
Decomposition The decaying of a dead organism
Denitrification The conversion of nitrates into atmospheric nitrogen
Double blind [Technique in which] neither the tester nor the person being tested knows which is the real pill and which is the placebo.
Ecology Study of the interaction between organisms themselves and their environment.
Ecosystem Organisms and their (interactions with) environment
Edaphic Factor Factors relating to the soil [which affects the distribution of organisms in a (terrestrial) ecosystem]
Egestion Removal of unabsorbed material from the body
Excretion Removal of the waste products of metabolisms
Food Web Interconnected food chains or more than one species at each trophic level
Grazing Food Chain Feeding relationship between organisms in which energy is transferred.
Habitat (Place) where a species (or an organism) lives
Herbivore An animal that feeds on plants only.
Hypothesis Educated guess based on observation
Life [characteristics of] Common features that separate living things from non-living things (organisation, nutrition, excretion, response & reproduction).
Metabolism All the chemical reactions taking place in living organisms
Niche The functional role of an organism (in an ecosystem)
Nitrification The process of converting ammonia into nitrites and/or nitrites to nitrates
Nitrogen fixing The conversion of nitrogen into nitrates.
Nutrition The obtaining or making of food by living organisms
Parasitism An organism which lives in or on another causing it harm.
Placebo Control used in drug testing
Pollution The harmful addition to the environment (by humans)
Population The numbers of a particular species [in a particular ecosystem]
Predation The act of killing and eating another animal ( or organism) for food.
Predator An animal (or organism ) which kills and eats an animal (or organism or prey)
Prey * The animal hunted and killed by its predator
Primary Consumer An organism which feeds on the primary producer.
Principle or Law A proven theory
Producer An organism which makes its own food
Pyramid ofNumbers The amount of organisms at each trophic level.
Qualitative survey A survey which indicates if a species is present or not
Quantitative survey A survey which records or estimates the numbers of a species (in a particular ecosystem).
Replicate(s) Make a duplicate(s) of an experiment or procedure
Reproduction The creating of new individuals of its own kind by an organism (by either sexual or asexual means).
Response The reacting of an organism to stimuli
Scramble competition A confrontation which results in each organism getting some of the resource
Secondary Consumer An organism which feeds on the primary consumer.
Symbiosis * Relationship between (different) species in which at least one benefits
Tertiary Consumer An organism which feeds on the secondary consumer..
Theory A proven hypothesis
Trophic Level The position of an organism in a food chain
Created by: Niall Malone
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