BIOL 1001 Final: BIOL 1001 - CHAPTER 6 P1
18 Feb 2017
School
Department
Course
Professor
Document Summary
Chapter 6: phylogeny (evolutionary history of species or group of species) Fossil record provides much useful info. Systematics: the study of morphological & biochemical resemblances between species: used as basis for inferring evolutionary relationships, molecular systematics: use of nucleotide sequences from dna/rna, or amino acid sequences from proteins, to infer evolutionary relationships. Allows comparisons between organisms that are physically very different from each other. Distantly related species are often physically very different but morphological comparisons are often difficult, ex. Silversword alliance closely related, but physically different. Human: explain the difference between homologous & analogous traits. Homology - similarity due to shared ancestry. Shared traits were present in most recent shared ancestor. Analogy similarity due to shared function. Similar environments mean there are similar adaptations due to convergent evolution (evolution of 2 different lineages along a similar path) Shared traits not present in most recent shared ancestor. Mammals of australia having similar body shapes as mammals of n.
