BIO 101 1st Edition Lecture 1 Outline of Current Lecture I Structural Levels of Life II Emergent Properties III Cell Theory IV Heritable Information V Structure and Function VI Unity in Diversity Chapter 1 Biology the study of life Unifying themes in biology help to organize all of the information helps to remember it and to think about it 1 Life is organized on many structural levels start at the simplest level increasing complexity Atoms molecules macromolecules cell structure cells tissues organs organisms populations communities ecosystem 2 Emergent properties as you move up in complexity new properties emerge 3 Cellular basis of life cell theory 2 parts a all living things are made of cells b all cells come from other cells 4 Heritable information a DNA is the genetic information in cells b The information in DNA flows in 2 ways i Parent offsprings it is DNA that moves from parent to offspring ii DNA RNA proteins DNA has the code for how to make proteins It is the proteins that determine what an organism is and what it can do The study of how DNA is passed to offspring is called genetics 5 Correlation of structure and function what a molecule looks like determines what it can do 6 Unity in diversity 1 5 million species identified estimated 30 million species exist Hugo Diversity Yet all living things share certain traits Ex genetic code same in all living things Glycolysis series of chemical reactions that uses food to produce readily useable energy Theory of Evolution greatest unifying theme in biology explains both diversity and unity in life BIO 101 1st Edition Unity because all living things today connected because they came from a common ancestor in the ancient past Diversity because living things have changed changed means evolve to fit a particular environment
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