90 - 106 Flashcards
Community
Two or more different populations that live in a defined area
Population
A group of individuals that belong to the same species and live in the same area
Ecosystem
A collection of all organisms that live in a particular place, together with their non living environment
Biome
A group of ecosystems that have the same climate and dominant organisms
Autotrophs
An organism that can make its own food internally
Heterotrophs
An organism that relies on other organisms for energy and food supply
Food Chain
A series of steps in which organisms transfer energy by eating or being eaten
Food web
Links all the food chains in a ecosystem together
Bio geochemical cycle
A cycle by which materials necessary for organisms are circulated between organisms and through the environment
Environmental quality
The state of environmental conditions.
Transpiration
The evaporation of water from the leaves of plants
Nitrogen fixation
The conversion of nitrogen gas into ammonia by bacteria living in the soil
Symbiosis
Any relationship in which two species live together
Mutualism
A symbiotic relationship in which both species benefit
Commensalism
A symbiotic relationship in which one organism lives on or inside another organism and causes it no harm
