BIOL 152 9thEdition Lecture 7 Outline of Last Lecture I Extrinsic Mechanisms II Geographic Separation III NO Geographic Separation IV Review Outline of Current Lecture I Life on Earth II The First Cells III Classifying Life Current Lecture I II III Life on Earth Early Earth s Atmosphere o Mostly N gas and CO2 water vapor Life on Earth is carbon based What makes the carbon atom so special o It has four electrons in its valence shells The Building Blocks of Life What is living matter composed of o Carbon o Hydrogen o Oxygen o Nitrogen o Phosphorus o Sulfur How do you go from inorganic gases to organic molecules Then What The First Cells So now there s an outside to the protocell what does it need to evolve o Needs genetic material to evolve That s inheritable Classifying Life Man s and woman s underlying need to name everything A The advent of modern classification Aristotle These notes represent a detailed interpretation of the professor s lecture GradeBuddy is best used as a supplement to your own notes not as a substitute o Hierarchical structure Structural complexity Behavior Degree of development at birth Carol von Linne o Carolus Linnaeus o Modern Classification Hierarchical structure Resemblances Binomial nomenclature B Linnean Classification from most general to most specific o Domain o Kingdom o Phylum o Class o Order o Family o Genus o Species Scientific name genus species OR Genus Species C Classification as a Science Phylogeny ies o Evolutionary history Systematics o Diversity and relationships D Determining Relatedness Morphology o Obvious physical differences o Homology Homologous common ancestor o Analogy Analogous similar function Biochemistry o Compounds o Metabolic pathways o Proteins Molecular Systematics o Using DNA o Sequences and genomes