Introduction to Biology Essential Questions: What are the characteristics of life? How can experiments and observations help inform our understanding of biology? Copyright Cmassengale

Biology – The Study of Life Life arose more than 3.5 billion years ago First organisms (living things) were single celled Only life on Earth for millions of years Organisms changed over time (evolved) Copyright Cmassengale

Copyright Cmassengale Fields of Biology Copyright Cmassengale

Units of Biology : Biochemistry Properties of water Macromolecules Enzymes Copyright Cmassengale

Units of Biology : Cell Biology Plant and Animal Cell Cell Membrane Photosynthesis Respiration Plants Cell Cycle and Mitosis Copyright Cmassengale

Units of Biology : Genetics Meiosis Human Reproduction Mendel’s Laws Protein synthesis Copyright Cmassengale

Units of Biology : Evolution Natural Selection Theory of Evolution Classification Copyright Cmassengale

Units of Biology : Ecology Food web Changes in Ecosystem Loss of Biodiversity Human Impact Copyright Cmassengale

Units of Biology : Human Physiology The Brain Blood Flow Immune Systems Copyright Cmassengale

Copyright Cmassengale What is Life? How do we know something is living? Copyright Cmassengale

7 Characteristics of Living Things 1. All living things are made of cells. Cells are the basic unit of life. 2. All living things uses energy. Energy comes from the sun. 3. All living things respond to stimulus (stimuli- pleural). Stimulus- change in environment (hot= sweat) Copyright Cmassengale

7 Characteristics of Living Things 4. All living things reproduce. Sexual or asexual 5. All living things grow and develop. 6. All living things change to fit their environment (adapt). If not, they risk becoming extinct. Copyright Cmassengale

7 Characteristics of Living Things 7. All living things have DNA. DNA provides instructions for making molecules called proteins. Proteins build cells. DNA carries the genetic material from parent to offspring (heredity). https://www.youtube.com/watch?v=0NnFhY_STFQ Copyright Cmassengale