BIOLOGY The study of life – all living things, from single celled organisms to complex multicellular organisms and the global interactions of millions of different organisms

I. UNIFYING THEMES The cell is the basic unit of life Homeostasis Unicellular, multicellular, differentiation Homeostasis Reproduction and Inheritance (DNA, gene, sexual and asexual reproduction) Evolution (natural selection) Interdependence of organisms (ecology, ecosystems) Matter, Energy and Organization (photo, autotrophs, heterotrophs)

II. CHARACTERISTICS OF LIFE Cells Highly Organized Energy use - metabolism Homeostasis Growth – cell division and growth Reproduction

III. SCIENTIFIC METHOD Observe Ask a ? Form hypothesis A possible explanation for what was observed Intelligent guess If ….., then….. statement

III. SCI METHOD cont’d Experiment Setup: Control Dependent variable Test hypothesis under controlled conditions Setup: Control Dependent variable Independent variable Constants

III. SCI METHOD cont’d Draw conclusions Share knowledge Accept or reject hypothesis Share knowledge After hypothesis withstands testing, may become theory

IV. MICROSCOPY Magnification vs. resolution Know SI prefixes Light microscopes Electron microscopes SEM TEM