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19 Cards in this Set
- Front
- Back
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commensalism
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symbiotice relationship in which one species benefits and the other internal organs are suspeneded; human, fish, and insects are coelomates.
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biotic factor
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all living organisms in habiting ay of earth's many different environments.
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biosphere
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life-supporting protions of earth composed of air, land, freshwater, and saltwater.
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autotroph
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organisms that are able to synthesize food using sum energy stored in chemical compunds; plants are the most common autotroph
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abiotic factor
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nonliving parts of the environment such as air current, temperatture, soil, light, and moisture.
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trophic level
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link represented by each organism in a food chain; represents a feeding step in the transfer of energy and matter in an ecosystem.
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symbiosis
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permanent, close association between two or more organisms of different species.
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scanvenger
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animal such as a vulture that plays a positive role in the ecosystem by consuming dead organisms and their refuse.
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population
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interbreeding individuals of one species that compete with one another for food, water and mates and live in the same place at the same time.
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parasitism
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symbiotic relationship in which one species benefites at the expeense of the other species; examples are ticks and tapeworms.
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niche
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role of a particular species in a community regarding food, space, reprodction, and how it interacts with abiotic factors.
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mutualism
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symbiotic relationship beneifical to both species; acacia trees and ants have a mutualistic relationship.
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heterototroph
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organisms unable to make their oun food, they roly on autotrophs as their nutrient and energy source; examples are rebbits and cows; also called consumers.
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habitat
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collectio of niches in which an organism lives its life.
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food web
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shows all the possible feeding relationship in a community at each trophic level; represents a network of interconnected food chains.
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food chain
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a possible route for the transfer of matter and energy through on ecosytem from autotrophs through heterotrophs and decomposers.
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ecoystem
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populations in a community and abiotic factors with whish they interact; examples are terrestrial and marine ecosytems.
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decomposer
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organisms, such as many bacteria and most fungi, that play beneficial roles in all ecosytems by breaking down and absorbing nutrients from dead and decaying organic matter.
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ecology
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scientific study of interations between organisms andt their environments; for example, ecologists study how day length influences migrating bird behavior
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