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Chapter 2 Vocab

Biology

TermDefinition
Ecology The study of interactions that take place between organisms and their environment.
Biosphere The portion of Earth that supports living things.
Abiotic Factors Non-living parts of an organism's environment.
Biotic Factors All of the living organisms that inhabit an environment.
Population A group of organisms in the same species that interbreed and live in the same area at the same time.
Biological Community Made up of interacting populations in a certain area at a certain time.
Ecosystem Made up of interacting populations in a biological community, and the community's abiotic factors.
Habitat The place where an organism lives out it's life.
Niche All strategies and adaptations a species uses in it's environment.
Symbiosis The relationship in which there is a close and permanent association between organisms of different species.
Commensalism A symbiotic relationship in which one species benefits and the other is neither harmed nor benefited.
Mutualism A symbiotic relationship in which both species benefit.
Parasitism A symbiotic relationship in which a member of one species derives benefit at the expense of another species.
Autotroph An organism that uses light energy or energy stored in chemical compounds to make energy rich compounds.
Heterotroph An organism that cannot make its own food and feeds on other organisms.
Decomposer Breaks down complex compounds of dead and decaying plants and animals into simpler molecules that can be more easily absorbed.
Food Chain A simple model that scientists use to show how matter and energy move through an ecosystem.
Tropic Level A feeding step in the passage of energy and materials.
Food Web A model that shows all of the possible feeding relationships at each tropic level in a community.
Biomass The total weight of living matter at each tropic level.
Terrestrial Ecosystem An ecosystem on land.
Aquatic Ecosystem Ecosystems in both fresh and salt water.
Created by: NicholasRatay
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