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Populations and Communities

Quiz yourself by thinking what should be in each of the black spaces below before clicking on it to display the answer.
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Question
Answer
organism   a living thing  
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habitat   an enviroment that provides the things for an organism to live  
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biotic factor   a living part of an organisms habitat  
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photosynthesis   the process in which an organism uses water along with sunlight and carbon dioxide  
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abiotic factors   nonliving part of an organisms habitat  
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species   a group of organisms that are physically similar and can mate  
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population   all the members of one species in a particular area  
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community   all the different populations that live together  
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ecosystem   the community of organisms that live in an area  
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ecology   the study of how living things interact with each other and their environment  
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estimate   an approximation of a number based on reasonable assumptions  
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birth rate   the number of births in a population  
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death rate   the number of deaths in a population  
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immigration   moving into a population  
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emigration   leaving a population  
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population density   the number of individuals in an area of specific size  
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natural selection   individuals whose unique characteristics are best suited for their environment tend to survive and produce offspring  
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adaptions   the behaviors and physical characteristics that allow organisms to live successfully in their environment  
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niche   the type of food the organism eats , how it obtains this food, sandwich other organism as food  
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competition   the struggle between organisms to survive as they attempt to use the same limited resource  
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predator   the organism that does the killing  
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predation   an interaction in which one organism kills another  
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prey   the organism that is killed  
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symboisis   a close relationship between two species that benifits at least one of the species  
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mutalism   a relationship in which both species benifit  
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commensalism   a relationship in wich one species benifits and the other species is neither harmed nor helped  
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parasitism   one organism living on or inside another organism and harming it  
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parasite   the organism that benifits  
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host   the organism that it lives on or is in  
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succesion   the series of predictable changes that occur in a community over time  
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primary succesion   the series of changes that occur in in an area where no soil or organisms exist  
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pioneer species   the first species to populate an area  
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secondary succesion   the series of changes that occur in an area where the ecosystem has been disturbed but soil and organisms still exist  
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Created by: isbrennan
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