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chapter 1

populations and Communities

organism a living thing
habitat an envirment
biotic factor a living part of a organisms habitat
abiotic factor a nonliving part of a organisms habitat
Photosythisis The prosses in which plants use water along with carbon dioxide to make its own food
Species A group of organisms that are physically simaler and can mate and reperduce offspring and reperduce
Populations How many of the species are in a area
Community More than one species in a area
Ecosystem A place where there are living things and nonliving things
Ecology The effects of different environments
Emigration Leaving a population
Estimate An approximation of a number based on reasonable assumptions
Birth rate The number of births in a population in a certain amount of time
Death rate The number of deaths in a certain amount of time
Immigration Moving into a population
Population density The number of individuals in a specific area
Limiting factor An environmental factor that causes a population to decrease
Carrying capacity The largest population that an area can support
Natural selection A process by which charecteristic that make individual better suited to its envirment become more common in a species
Adaptations A behavior or physical charecteristic that allows an organism to live successfully in its envirment
Niche The role of an organism in its habitat,or how it makes its living
Competition The struggle between organisms to survive as they attempt to use the same resource
Predation An interaction in which one organism kills another
Predator The organism that does the killing
Prey The organism that gets killed
Symbiosis A close relationship between two species that benefits something good for for at least one of them
Mutualism A close relationship in which both species benefit
Commensalism A relationship in which one species benefits and the other species is neither helped nor harmed
Parasitism One organism living on or inside another organism and not harming it
Parasite The organism that benefits
Host The organism that does not benefit
Created by: Jgood



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