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Hoffman Bio. S2 #4

Semester 2 - Vocab List #4

TermDefinition
Evolution process of change in a species over time
Species group of organisms that are closely related and can produce fertile offspring
Fossils trace or remains of an organism that existed in the past
Variation differences of a trait within a species in each generation
Adaptation a feature that allows an organism to better survive and reproduce in its environment
Artificial Selection process by which humans change a species by breeding it for certain traits
Natural Selection process by which organisms better suited to their environment survive and reproduce the desired traits to each generation
Heritability the ability of a trait to be passed down from one generation to the next
Population all the individuals of a species that live in an area
Fitness measure of an organisms ability to survive and produce offspring relative to other members within a population
Normal Distribution type of distribution, in which the frequency is highest near the mean value and decreases toward each extreme end of the range
Directional Selection type of selection that favors phenotypes at one extreme of a trait’s range
Stabilizing Selection type of selection where the intermediate phenotype is favored and becomes more common in the population
Disruptive Selection type of selection where both extreme phenotypes are favored, while individuals with intermediate phenotypes are selected againstby something in nature
Speciation rise of two or more species from one existing species
Extinction elimination of a species from Earth
Created by: juhoffman