nonliving part of an organism's environment
portion of Earth that supports life
all the living organisms that inhabit an environment
symbiotic relationship in which one species benefits and the other species if neither harmed nor benefited
collection of interacting populations
scientific study of interactions among organisms and their environment
made up of the interactions among the populations in a community and a community's physical surroundings
place where an organism lives out its life
symbiotic relationship in which both species benefit
role and position a species has in its environment
symbiotic relationship in which one organism derives benefit at the expense of the other
group of organsisms of one species that interbreed and live in the same place at the same time
relationship in which there is a close and permanent association among organsisms of different species
organism that use energy from the sun or energy stored in chemical compounds to manufacture their own nutrients
organism that breaks down and absorbs nutrients from dead organisms
simple model of how scientists use to show how matter and energy move through an ecosystem
expresses all the possible feeding relationships at each trophic level in a community
organism that cannot make their own food and must feed on other organisms
animal that feed on other animals that have already died
organism in a food chain that represents a feeding step in the passage of energy and materials through an ecosystem
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