Terms in this set (34)
Change in a kind of organism over time; process by which modern organisms have descended from ancient organisms.
A characteristic that improves an individual's ability to survive and reproduce in a particular environment.
English naturalist. He studied the plants and animals of South America and the Pacific islands, and in his book On the Origin of Species by Means of Natural Selection (1859) set forth his theory of evolution. Know as the Father of Evolution
A process in which individuals that have certain inherited traits tend to survive and reproduce at higher rates than other individuals because of those traits in a particular.
A form of selection in which individuals with certain inherited characteristics are more likely than other individuals to obtain mates.
Selective breeding of plants and animals to promote the occurrence of desirable traits in offspring
Body parts that share a common structure, but not function, due to a common ancestor.
Body parts that share a common function, but not structure, due to common adaptations.
Formation of new species
Process by which two species evolve in response to changes in each other
When unrelated organisms independently evolve similarities when adapting to similar environments
When two or more species sharing a common ancestor become more different over time
Survival of the Fittest
Process by which individuals that are better suited to their environment survive and reproduce most successfully; also called natural selection
Remaining body structure that may have had an important function in a species' ancestors, but has no clear function in the modern species.
A diagram that is based on patterns of shared, derived traits and that shows the evolutionary relationships between groups of organisms
Chronological collection of life's remains in sedimentary rock layers
Evidence of Evolution
fossil record, biogeography, homologous structures of living organisms, embryo development, and DNA evidence
The branch of zoology studying the early development of living things.
The universal genetic code and homologous molecules such as genes and proteins provide evidence of common descent.
The study of where organisms live now and where they and their ancestors lived in the past
All the genes, including all the different alleles for each gene, that are present in a population at any one time
Number of times that an allele occurs in a gene pool compared with the number of alleles in that pool for the same gene
Movement of alleles into or out of a population due to the migration of individuals to or from the population
A change in the allele frequency of a population as a result of chance events rather than natural selection.
A change in allele frequency following a dramatic reduction in the size of a population
Physical & Behavioral traits that make an organism more likely to reproduce in their environment
Pathway of natural selection in which one uncommon phenotype is selected over a more common phenotype
Natural selection that favors intermediate variants by acting against extreme phenotypes
Natural selection in which individuals on both extremes of a phenotypic range survive or reproduce more successfully than do individuals with intermediate phenotypes.
Pattern of evolution in which long stable periods are interrupted by brief periods of more rapid change
Hardy Weinberg Equilibrium
Stable, unchanging populations which are isolated and have little need for natural selection or mutations
The variety of different types of genes in a species or population.
5 Conditions of Hardy Weinberg Equilibrium
Five conditions are needed to reach Hardy Weinberg Equilibrium: 1. No mutation, 2. no natural selection, 3. random mating, 4. large pops to prevent genetic drift, 5. no migration in or out of the population
3 Conditons for Natural Selection
Three conditions are needed for natural selection to occur: 1. reproduction, 2. heredity, 3. variation in fitness due to variation of phenotype
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