Evolution

geologic evolution

changes in the earth over time

organic evolution

changes in the living organisms over time

genetic variation

not every member in a species is identical, some will survive better than others

adaption

a change in an organism's phenotype or behavior

evolution

change in an organism’s dna over generation

divergent evolution

a single species or group of closely related species evolves into several different types of species, each adapted to the environment in a slightly different way

convergent evolution

why unrelated species look similar to one another, similar environmental factors affect organisms in similar ways

co evolution

an interaction between 2 organisms causes one organism to change in response in another organism

fossils

show a gradual change over time in organisms once found on earth

homologous body structures

body structures developed from similar embryonic tissues, but serve slightly different functions

artificial selection

selection by humans for breeding of useful traits from the natural variations among a species

fitness

the ability of an individual to survive and reproduce in a specific environment

adaption

any trait that increases an organisms chance of survival

natural selection

the traits that are helpful to an organism that help live and pass on its genes

struggle of existence

high birthrates and shortage of resources would force organisms to compete for resources

competition

drives natural selection

variation

the natural variation in the characteristics of individuals that are part of a population

overproduction

ecosystems are unable to support all individuals within a population to an age or reproduction causing competition among offspring

selection

the more adapted individuals within a population are more likely to survive while others who have less adapted characteristics are less likely

reproduction

the better adapted individuals within a population are more likely to survive and pass on characteristics

phylogeny

evolutionary relationships among organisms

phylogenic tree

diagram that represents evolutionary relationships among organisms

derived traits

traits that arise during the evolution of a group and differ from the traits of the character of the group