A Record of Evolution?A Record of Evolution?SWBAT discuss the purpose of evolutionary SWBAT discuss the purpose of evolutionary family trees and present arguments against family trees and present arguments against them; give several examples of homologous them; give several examples of homologous

structures proposed by evolutionists and explain structures proposed by evolutionists and explain them from a Creationist perspective; explain them from a Creationist perspective; explain

what is meant by “the fossil record” and what is meant by “the fossil record” and describe evolutionist’s view of fossil formationdescribe evolutionist’s view of fossil formation

Evolutionary Family TreesEvolutionary Family Trees Evolutionary family tree Evolutionary family tree

– lining up groups to show a path of lining up groups to show a path of biological evolutionbiological evolution

How would a family tree be similar to How would a family tree be similar to an evolutionary family tree?an evolutionary family tree?– They both ancestors. They both need to They both ancestors. They both need to

have a common ancestor that created have a common ancestor that created each brancheach branch

Missing LinksMissing Links What is a missing link?What is a missing link?

– An “in-between” organism, that would have lived if one An “in-between” organism, that would have lived if one type of organism evolved into anothertype of organism evolved into another

Homologous structures Homologous structures – Common similarities that species share due to common Common similarities that species share due to common

ancestors ancestors What are the problems that arise when scientists What are the problems that arise when scientists

study homology?study homology?– They disagree on what should be considered They disagree on what should be considered

homologoushomologous– Embryo development is different even though the Embryo development is different even though the

structures they produce are considered homologous. structures they produce are considered homologous. They are linked to different genesThey are linked to different genes

Evolution and the Fossil RecordEvolution and the Fossil Record What is the fossil record?What is the fossil record?

– A record of past living things preserved in A record of past living things preserved in layers of rocklayers of rock

List the reasons that the fossil record does List the reasons that the fossil record does not support biological evolution.not support biological evolution.– Nowhere have scientists found a complete or Nowhere have scientists found a complete or

uniterrupted series of fossil layersuniterrupted series of fossil layers– There is no fossil representation of missing There is no fossil representation of missing

linkslinks– There is evidence to support the layers of There is evidence to support the layers of

fossils being laid down over a short period of fossils being laid down over a short period of time.time.

Get your lab notebooksGet your lab notebooks In your groups compare the various In your groups compare the various

evolutionary family trees on page evolutionary family trees on page SA101SA101

Look for differences in evolutionary Look for differences in evolutionary paths and compile a list.paths and compile a list.