27Studies of Biochemistry SpeciesSequence of Amino Acids in the Same part of the Hemoglobin MoleculeHumanLys-Glu-His-IsoHorseArg-Lys-His-LysGorillaLys-Glu-His-LysChimpanzeeZebraArg-Lys-His-Arg
28Which organisms appear to be more closely related to each other? Human and chimpanzee have no differences in their amino acid sequence suggesting their close evolutionary relationship, they have a more recent common ancestor. Studies of other chemicals, like proteins used in digestion, show similar comparisons in these organisms.
30DNAFrom studies of DNAThe sequence of the nucleotides making up their DNA would also be similar because DNA determines the sequence of amino acids in proteins.
31DIRECT OBSERVATION OF EVOLUTION OCCURRING IN MODERN DAY ORGANISMS From observation
32Observations of Evolution in modern organisms Mosquitoes resistance to insecticidesBacteria resistance to antibioticsNew strains of Plasmodium that cause MalariaNew strains of TB (tuberculosis)Peppered mothDarwin finches
33Has and Does Evolution Occur? Scientists do not dispute that evolution does occur. Evolution is a FACT.How evolution occurs is not completely understood.Charles Darwin explained how evolution occurred through natural selection. Natural selection is a well documented THEORY uniting all of biology.Modern evolutionary theory uses ideas of genetics, particularly mutations, to help explain how evolution may occur. (Darwin didn’t know about mutations.)