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Biology organisms

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www.expertsmind.com/topic/biology/microbiology-92241.aspx

www.expertsmind.com/topic/biology/microbiology-92241.aspx

Published in: Technology, Education

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Transcript

  • 1. Biology Organisms
  • 2. Populations
  • 3. Ecosystems
  • 4. The Biosphere
  • 5. Life’s Levels of OrganizationThe world of life shows levels of organization, from the simple to the complex, which extend through: cells (made of?) tissues & organs organisms populations communities ecosystems the biosphere
  • 6. Reductionist Principle The study of life is complex so • Chemicals broken down into compartments • Cells Within a cell • Tissues Among cells in an organ • Organs Among the organ systems in an • Systems organism • Organism Between organisms and the • Population environment • Community Among individuals in a • Ecosystem population Between species
  • 7. The Cell, Structure & FunctionWhat is a cell ?(The cell is the Structural and functional unit of all livingorganisms)Two Types of cells:1- Prokaryotic cells: cells without a nuclear membraneThe DNA is free in the cytoplasm: Bacteria and Cyanobacteria2- Eukaryotic cells: has a proper nucleus with a nuclearmembrane: plants, animals ….
  • 8. What does this figure describe? What else “flows” from producers toconsumers to decomposers?
  • 9. I. Characteristics of Living OrganismsA. Living things share the following characteristics: 1. Living things are made up of units called cells. a. Remember that cells are like little packages f chemical reactions. b. Life processes only occur as a result of chemical reactions in cells (life is chemistry) 2. Living things reproduce. 3. Living things are based on a universal genetic code. (Contain DNA)
  • 10. 4. Living things grow and develop.5. Living things obtain and use materials and energy. (Eat or Photosynthesize)6. Living things respond to their environment.7. Living things maintain a stable internal environment. (Maintain Homeostasis) a. Homeo=Same Stasis= Status8. Taken as a group, living things change over time. (Evolve)