91-106 Flashcards
(16 cards)
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 (producer)
An organism that can make its own food internally.
Heterotroph (consumer)
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.
Biogeochemical Cycle
A cycle by which materials necessary for organisms are
circulated between organisms and through the environment. (e.g. water, carbon,
nitrogen)
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.
Parasitism
A symbiotic relationship in which one organism lives on or inside
another organism and harms it.
