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Biology

WCHS Biology Chapter 2

worddefinition
Autotroph organisms that use energy from the sun or energy stored in chemical compounds to manufacture their own nutrients
Heterotroph organisms that cannot make their own food and must feed on other organisms for energy and nutrients
Decomposers organisms, such as fungi and bacteria, that break down and absorb nutrients from dead organisms
Food Chain simple model that shows how matter and energy move through an ecosystem
Trophic Level organism that represents a feeding step in the movement of energy and materials through and ecosystem
Food Web model that shows all the possible feeding relationships at each trophic level in a community
Biomass the total mass or weight of all living matter in a given area
Parasitism symbiotic relationship in which one organism benefits at the same expense of another, usually another species
Commensalism symbiotic relationship in which one species benefits and the species is neither harmed nor benefited
Mutualism a symbiotic relationship in which both species benefit
Niche role or position a species has in its environment
Habitat place where an organism lives
Ecosystem interactions among populations in a community
Biological Community a community made up of interacting populations in a certain area at a certain time
Population group of organisms, all of the same species, which interbreed and live in the same place at the same time
Biotic Factors all the living organisms that inhabit and environment
Abiotic Factors nonliving parts of an organism's environment examples--air currents--temperature--light--soil, etc..
Biosphere position of Earth that supports life
Ecology scientific study of interactions between organisms and their environment
Created by: dmoudy
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