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biology words week 3
Stack #208505
| Question | Answer |
|---|---|
| trophic level | organism that represents a feecing step in the movement of enrgy and materials through an ecosystem |
| tolerance | the ability of an organism to withstand fluctuations in biotic and abiotic enviromnetal factors |
| symbiosis | permanent close association between two or more organisms of different species |
| succession | orderly, natural changes, and species replacements that take place in communities of an ecosystem over time |
| secondary succcession | sequence of changes that take place after a community is disrupted by natural disasters or human actions |
| primary succession | colonization of barren land by pioneer organisms |
| population | group of organisms all of the same species which interbreed and live in the same place at the same time |
| parasitism | symbiotic relationship in which one organism benefits at the expense of another usually another species |
| niche | role or position a species has in its environment |
| mutualism | a symbiotic relationship in which both species benefit |
| limiting factor | any biotic or abiotic factor that restricts the existence, numbers, reproduction or distribution of organisms |
| heterotroph | organisms that cannot make their own food and must feed on other organisms for energy and nutrients |
| habitat | place wher an organism lives out its life |
| food web | model that shows all the possible feeding relationships at each triphic level in a community |
| food chain | simple model that shows how matter and energy move through an ecosystem |
| decomposer | organism such as fungi and bacteria that break down and absorb nutrients from dead orgainsms |
| commensalims | sybiotic relationship in which one species benefits and the other species in neither harmed nor benefited |
| climax community | a stable mature community that undergoes little or no change in species over time |
| biotic factor | all the living organisms that inhabit an environment |
| biosphere | portion of earth that supports life, exteds from high in the atmosphere to the bottom of the oceans |
| biomass | that total mass or weight of al liveing matter in a given area |
| biological community | a community made up of interaction populations in a cetain area at a certain time |
| autotroph | organims that use energy from the sun or energy stored in chemical compounds to manafacture their own nutrients |
| abiotic factor | nonliving |
Created by:
ChristyCastine
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