Outline of Last LectureOutline of Current LectureCurrent LectureI. Introductiona. What is Biology?b. Living systemsi. Classificationc. Approaches in Biologyd. Major theoriesII. Atoms/Chemistrya. What is an atom?b. How atoms interact…BIO SCI 150 1st Edition Lecture 1Outline of Last Lecture I. NA (first lecture of the year)Outline of Current Lecture I. Introductiona. What is Biology?b. Living systemsi. Classificationc. Approaches in Biologyd. Major theoriesII. Atoms/Chemistrya. What is an atom?b. How atoms interact…Current LectureI. IntroductionOld Exams on D2L are close to the one you will be taking (same topics will be covered)a. What is Biology?Biology= the study of life- Detailed structure that uses chemistry to cheat the laws of physics- Utilize energy (store, use, create, etc.)Levels of organizations = atom  ecosystem (will be covered later on)- Theory – all living creates are created of cellsMajor Themes of Bio- Flow of Energy- Evolution- Storage and use of info- Cooperation- Structure determines function-Homeostasis – the tendency to obtain a stable equilibrium through physiological processes (ex. Your body temperature, changing but striving towards equilibrium).b. Living systemsLiving systems show these properties- Order- Reproduction- Growth and development- Ability to take in transform use energy- Respond to the environment- Evolution- Homeostasis (see above)- Emergent Properties: the whole is much greater than the sum of its partLiving systems show unity and diversity- Unityo Common genetic codeo Protein structureso Enzymes systemo Cell structures- Diversityo Evolutiono Million different specieso Genetic varieties among species i. ClassificationTypes of organisms:- Prokaryote – bacteria and archaea, no nucleus- Eukaryote – nucleolus, mitochondria- Virus – not living “pure information”Types of Classification:- By Decento Bacteriao Archaea – single celled micro-organism o Eukaryotes – most common of the living things- By Characteristics – most by how things eat (don’t need to know specifics)c. Approaches in BiologyDifferent approaches in the study of biology:- Holism – must be intact and real- Reductionism – reduce to simple units to understand whole organism- Scientific Method – based on argumentsd. Major theoriesMajor theories in Biology: (will be covered later in the semester)- Cell Theory- Gene Theory- Theory of Heredity- Theory of EvolutionII. Atoms/Chemistrya. What is an atom?Atoms - “Basic unit of Mater”- element  atom  compound- Biology is mostly concerned with the first 3 rows (minus d) of the periodic table- Weight of protons is in Daltons weight is 2 x proton amount AKA protons + neutrons- Stable isotopes – does not lose neutrons- Radioactive– losses electrons and protons- Add energy – e- goes up a level and vice versab. How atoms interact…Bonds- Ionic – one gives an electron and one takes (NaCl), metal + nonmetalo Parts of the compound are fully charged Cation (+) – Na Anion (-) – Cl- Covalent– sharing of electrons, nonmetal + nonmetalo Polar–compound is slightly charged on certain sides of the compound (H2O) o Nonpolar – not slightly charged (N2)o Hydrogen – bonds with hydrogen (NH3)- Metallic – metal + metal (just know the type)Van der Wohls interaction – weak force between compoundsKey point!- Energy is required to break bonds and vice