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How Comparative Biochemistry Supports the Theory of Evolution
Transcript of How Comparative Biochemistry Supports the Theory of Evolution
Theory of Evolution Purpose Works Cited used to estimate phylogenetic relationships and divergent evolution
phylogenetics is the study of comparative biochemistry
comparing evolutionary change among species based on their DNA/protein sequences
DNA sequences are used for relatively recent events
protein sequences are used for more ancient events
used to find common ancestors
evolutionary change of RNA and DNA sequences is roughly proportional to evolutionary time many scientists observe changes in DNA or protein sequences to trace an organism back to its ancestors
mutations that have occurred have caused organisms to evolve into other organisms
other species have evolved due to gradualism
over time, as a result of changes in sequences, some species have gone extinct and others have evolved into new species
the tree of life was derived mostly from the small subunit rRNA gene6
most prokaryote phylogenies have been constructed by analyzing the sequences of the small subunit rRNA gene
phylogenic trees of life are diagrams showing evolutionary relationships between various species Concept 1. S. Blair Hedges. "The Origin and Evolution of Model Species" http://www.hedgeslab.net/pubs/140.pdf
2. Hiroshi Hori and Syozo Osawat. "Origin and Evolution of Organisms as Deduced from 5s Ribosomal RNA Sequences" http://ir2.nul.nagoya-u.ac.jp/jspui/bitstream/2237/6573/1/ot3222.pdf
4. http://secularpsychedelic.webs.com/photos/Evolution/Bear-Raccoon_Lineage.jpg Conclusion Comparing the changes made in sequencing of various organisms over time helps determine their origin, ancestors, relatives, and the details of how the species evolved. Discoveries recognition of eubacteria and archaebacteria and as two distinct domains.
human and chimpanzee's similar characteristics suggest divergent evolution.
eukaryotes evolve quicker than prokaryotes
after the seperation from Pteridophyta, the ancestor of seed plants evolved from two groups