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Chapter 5-3

Pages 165-169

QuestionAnswer
Other Evidence of Evolution Scientists compare body structures, developement before birth, and DNA sequences to determine the ecolutionary relationships among organisms.
*Similarities in Body Structure* organism’s body structure is its basic body plan (how its bones are arranged) ex: animals with backbones (vertabraes)
Animals with Similar Body Structure fish, amphibians, reptiles, birds, mammals (have internal skeleton with a backbone)
Common Ancestor Dolphins, birds and dolphins evolved from common ancestor
HOMOLOGUS STRUCTURES Body parts that are structurally similar in related species; provide evidence that the structures were inherited from a common ancestor.
Animals with Similar Body Structure fish, amphibians, reptiles, birds, mammals (have internal skeleton with a backbone)
Common Ancestor-Body Structure Dolphins, birds and dolphins evolved from common ancestor
HOMOLOGUS STRUCTURES Body parts that are structurally similar in related species; provide evidence that the structures were inherited from a common ancestor.
*Similarities in Early Development* Scientists can also make inferences about evoluntionary relationships by comparing early development of different organisms
Common Ancestor-Early Development Rat, turtle, and chicken- all have tail & tiny gill slits in throats
Turtles Are More Closely Related to a chicken than they are a rat
*Similarties in DNA* Scientists infer that the species inherited many of the same genes from a common ancestor
Comparing Genes Recently, scientists compared genes of different species to determine species
Closely Related The more closely realted the DNA sequences are, the more closely they are related
Comparing nitrogen bases scientist can find out how closely related species are by comparing nitrogen based sequences in the DNA
DNA bases DNA bases on a gens specify what kind of protein is produced
comparing amino acids scientist can also compare order of amino acids in protein to see how close realtated species are
elephant shrew that the elephant shrews DNA was more closey related to elephants than rodents
envidence about evolution
Created by: Avery R.
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