BIOLOGY 1M03 Lecture Notes - Lecture 3: Melanism, Antimicrobial Resistance, Speciation
15 Jan 2015
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Document Summary
All species in galapagos closely related, more so than any other species on the mainland. All species on island appear to have the same ancestor. Dispersed through ought archipelago and speciated as this happened. Also seen in other parts of the world (southeast asia) Striking discord between variety of species and geographic spread. Some species that appear in mainland asia do not appear in small island countries in same region. Junction in the middle; wallace"s line shows border between west/east occurring species; west end of sulawesi. Low sea levels allowed species to move from mainland asia to. Sumatra and java and from australia to new guinea via shelves. Genetic homology is a genetic similarity due to something inherited from ancestor. Developmental homology is a similarity among species in embryonic traits that is due to shared ancestry. Identical/almost identical system used by all known organisms to store the sequence of amino acids in proteins in nucleotides.
