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30 Cards in this Set

  • Front
  • Back
Organism
A living thing
habitat
An environment that provides the thigs an organsim needs to live, grow, and reproduce
Biotic Factor
A living part of an organism's habitat
Abiotic Factor
A nonliving part of an organism's habitat
Species
A group of similar organisms that can produce offspring
Population
All the members of one species in a particular area
Community
All the different populations that live together in an area
Ecosystem
All the living and nonliving things that interact in an area
Ecology
Study of how living things interact with each other and their environment
Estimate
An approximation of a number
Birth Rate
The number of births in a populationin a certain amount of time
Death Rate
the number of deaths in a population in a certain amount of time
emigration
leaving a population
Immigration
Moving into a population
Population Density
The number of individuals in a specific area
Limiting Factor
An environmental factor that causes population to decrease
Carrying Capacity
The largest population that an area can support
Natural Selection
A process by which characteristics that make an individual better suited to its environment become more common in a species.
Adaptation
A behavior or physical characteristic that allows an organism to live succesfully in its environment
niche
An organism's particular role in an ecosystem
Competition
Struggle between organisms for limited resources in a habitat
Predation
Interaction in which one organism kills and eats another
Predator
Organism that does the killing in predation
Prey
Organism that is killed in predation
Symbiosis
Relationship in which at least one species benefits
Mutualism
A relationship between two species in which both species benefit
Commensalism
A relationship between two species in which one species benefits and the other is neither helped nor harmed
parasitism
A relationship in which one organism lives on or in a host and harms it
Parasite
Organism that benefits in paratism
Host
Organism that is harmed in paratism