evolution Flashcards
who was jean baptistic lamarek
-created a line of descent by arranging their similarites and doffferences from older to more recent
-hypthosized that generations of the same species inerhited genes from their ancestors that help that adapt better to their enviorment and allow better survival
Charles Darwin
-travelled around the world for 5 years
-documented his absorvation of the biodiversity of the galapagos islands in plants and animals
created survival of the fittest
what was the purpose of darwins voyage?
-survey the coast of sputh america for the british navy
what was darwins job on the voyage
-observe, record and collect data specifying rocks, minerals plants and mines. he was given the prinicples of geography by lyell to help him calssify rocks
what is natural selection
individuals of a population that inherit genes that allow them to adapt to their enviorment
what is genetic mutation
a radnom chanbge is dna that creates a new allele for better adaption
what is gene flow
migration of individuals to a new enviorment brining new and unique alleles
what is a genetic drift
random population changes that makes certain allleles pass down from one generation to a new one by chance
what is the founder effect?
A change in a gene pool when a few indiviuals starts a new isolation population
bottleneck effect
range of gene distribution resulting from a rapid decrease in population
evidence of fossils
- fossila of the past sepcies can trace the evoluntionary history
evidence of biology
the study of the past and present geographical distribution of different species
evidence from anatomy
- certain organisms have homologous structures, bones, tendons and muscle
evidence from embryos
-showing similar stages of embryotic develpment
evidence of dna
- carries genetic informstion showing how closely related species are
