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chapter 4/ lesson 1

TermDefinition
Ecology The study of how organisms interact with each other and with their environments.
species a group of individuals that interbreed and produce fertile offspring
population Members of a species that live in the same area at the same time is a population
community All of the populations in a particular area.
ecosystem All of the living things and their physical environments within a particular area.
biosphere All parts of Earth that host life, with all of its organisms and environment.
biotic factor Parts of an ecosystem that are living or used to be living
abiotic factors Parts of an ecosystem that never been living
habitat The specific environment in which an organism lives.
resource Anything an organism needs, including nutrition, shelter, breeding sites, and mates.
population size The number of individual organisms present in a given population at a given time.
population density The number of individuals within a population per unit area.
population distribution or (population dispersion) describes how organisms are arranged in a area.
age structure describes the relative number of organisms of each age within a population.
Created by: TaeTae16
 

 



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