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ECOLOGY

Review for Ecology Test

QuestionAnswer
competition the struggle between organisms to survive as they attempt to use the same limited resources
population all the members of one species in a particular area
biotic factors the living parts of an ecosystem
abiotic factors the non-living parts of an ecosystem
mutualism a symbiotic relationship in which both species benefit
carrying capacity the largest population that an area can support
ecosystem all the living and nonliving things in a particular area
species group of organisms that are physically similar and can mate with each other and produce offspring that can also mate and reproduce
limiting factors environmental conditions that cause populations to decrease
commensalism symbiotic relationship in which one species benefits and the other species is neither helped nor harmed
community all the different populations that live together in an area
adaptations the behaviors and physical characteristics that allow organisms to live successfully in their environments
predation an interaction in which one organism kills another for food or nutrients
symbiosis any relationship in which two species live closely together and at least one of the species benefits
natural selection A characteristic that makes an individual better suited to a specific environment may eventually become more common in that species
biome A group of land ecosystems with similar temperatures, amounts of precipitation and organisms.
parasitism a symbiotic relationship where one organism is harmed and the other organism benefits
niche the role of an organism in its environment.
prey organism that is killed and eaten
predator organism that does the killing
ecology The scientific study of how living things interact with each other and their environment
primary consumer eat the producers (herbivores)
secondary consumer eat the primary consumers (omnivores/carnivores)
tertiary consumer eat the secondary consumers (carnivores)
food chain a series of events in which one organism eats another and obtains energy
food web many overlapping food chains in an ecosystem
producer form base of food web; An organism that makes its own food
consumer An organism that eats plants/animals
scavenger organisms that eat dead or injured animals
decomposer organisms that decompose (eat) dead plants and animals; return nutrients to the soil
Created by: mrsmassey