BIOL 1202 Chapter : January 29 2013
Document Summary
Test from 1st class to first day of the testing period (tuesday?) Evidence best explained by theory of evolution: fossil record, comparative anatomy, analogous vs homologous structures, homologous structures: different environmental forces favor changes in structures in related organisms. 2 things to know why do they look the same? homologous structure suggests common ancestry in regards to that structure and also why do they look different (divergent evolution change in form and function) Neil shubin"s your inner fish describes the evolution of fish to land. Tetrapods- between land and water animal: tracing arm bones from fish to humans. Many different characters that can be homologous or not. Dna sequences show how similar they are. Analogous structure= convergent evolution: do not suggest common ancestry, similar environmental forces select for similar structures in unrelated organisms (it just means that the structures aren"t the same, but they"re still related. Just not in that way: birds and insects= wings for flight.
