BIOL 152 9thEdition Lecture 7Outline of Last Lecture I. Extrinsic MechanismsII. Geographic SeparationIII. NO Geographic SeparationIV. ReviewOutline of Current Lecture I. Life on EarthII. The First CellsIII. Classifying Life Current LectureI. Life on Earth- Early Earth’s Atmosphereo 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 Carbono Hydrogeno Oxygeno Nitrogeno Phosphoruso Sulfur- How do you go from inorganic gases to organic molecules?- Then What?II. 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 inheritableIII. Classifying LifeMan’s (and woman’s) underlying need to name everythingA. The advent of modern classification- AristotleThese 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 Linneo Carolus Linnaeuso Modern Classification Hierarchical structure Resemblances Binomial nomenclatureB. Linnean Classification (from most general to most specific)o Domaino Kingdomo Phylumo Classo Ordero Familyo Genuso Species- Scientific name: genus species OR Genus SpeciesC. Classification as a Science- Phylogeny(ies)o Evolutionary history- Systematicso Diversity and relationshipsD. Determining Relatedness- Morphology o Obvious physical differences o Homology Homologous (common ancestor)o Analogy Analogous (similar function)- Biochemistryo Compoundso Metabolic pathwayso Proteins - Molecular Systematicso Using DNAo Sequences and