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Ch.5 Lesson 1-2

TermDefinition
Evolution In general terms, change over time
Gene A sequence of DNA that codes for a particular trait
Mutation A change in DNA
Genetic Drift Biological evolution that occurs by chance
Natural Selection The process by which traits that improve an organism's chances for survival and reproductiokn are passed on more frequently to offspring than those that do not
Fitness The degree to which an organism can reproduce successfully in its environment
Adaptation A heritable trait that increases the likelihood of an individual's survival and reproduction
Artificial Selection A human-controlled process to produce individuals with certain traits
Speciation The process by which new species are generated
Extinction The disappearance of a species from earth
Niche An organism's habitat, resource use, and fundamental role in a community
Tolerance The ability to survive and reproduce under changing environmental conditions
Resource Partitioning A process that allows different species to share common resources
Predation The process by which individuals of one species (the predators) hunt, capture, and feed on individuals of another species (the prey)
Coevolution The process by which two species evolve in response to changes in each other
Parasitism A relationship between two organisms from different species in which one organisms (the parasite) depends on another (the host) for nourishment or some other benefit
Symbiosis A long-term and physically close relationship between two organisms from different species in which at least one organism benefits; commensalism, mutualism, and parasitism are all symbiotic
Herbivory the act of feeding on a plant
Mutualism A relationship between two organisms from different species in which both organisms benefit
Commensalism A relationship between two organisms from different species in which one benefits and the other is unaffected
Created by: Andy.Vs
 



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