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Prep. for Test

TermDefinition
biotic factors living parts of the environment
abiotic factors non-living parts of the environment
producer/autotroph makes food through photosynthesis
consumer/heterotroph consumes other organisms
decomposer breaks down dead/decaying organisms and returns nutrients to soil
herbivore eats only plants
carnivore eats only animals/meat
omnivore eats plants and animals/meat
scavenger eats dead plants and animals
food chain shows how matter and energy move through an ecosystem in a series of steps showing which organisms transfer energy by eating and being eaten
food web model that shows all the possible feeding relationships at each trophic level in a community; links all food chains in an ecosystem together
sun's role in food chain/web ultimate source of energy for all living things
energy pyramid a triangular diagram that shows an ecosystem's loss of energy; each row in the pyramid represents a trophic (feeding) level in an ecosystem, and the area of a row represents the energy stored in that trophic level
symbiosis a close relationship between two species that benefits at least one of the species
mutualism a relationship in which both species benefit
commensalism a relationship in which one species benefits and the other species is neither helped nor harmed
parasitism involves one organism living on or inside another organism and harming it
predator/prey the predator is an organism that eats another organism and the prey is the organism being eaten
competition the relationship between two species (or individuals) in which both species (or individuals) attempt to use the same limited resource such that both are negatively affected by the relationship
adaptation the process of becoming adapted to an environment; an anatomical, physiological, or behavioral change that improves a population's ability to survive
Created by: letinaanh