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Intro Bio Notes 2010
Intro Bio Notes 2010
Intro Bio Notes 2010
Intro Bio Notes 2010
Intro Bio Notes 2010
Intro Bio Notes 2010
Intro Bio Notes 2010
Intro Bio Notes 2010
Intro Bio Notes 2010
Intro Bio Notes 2010
Intro Bio Notes 2010
Intro Bio Notes 2010
Intro Bio Notes 2010
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Intro Bio Notes 2010

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Transcript

  • 1. BIOLOGY THE STUDY OF LIFE
  • 2. Eight Characteristics of Life
    • H omeostasis
    • E nergy Use
    • R eproduction
    • C ells
    • A daptations
    • R esponse to Stimuli
    • G rowth & Development
    • O rganized
    Pneumonic Device: Great Aunt Rose Only Ever Cooks Rare Hamburgers
  • 3. Organisms:
    • Organisms must have all eight characteristics in order to be considered alive
    • An organism is something that is currently living
    • Ranges from: Bacteria (20 nm) to Armillaria ostoyae (10 km)
    To
  • 4. Homeostasis
    • Homeostasis- Stable internal condition
    • Examples:
        • Heart rate
        • Body temperature
        • ph levels
        • water levels
        • Others:
    • Organisms must be able to maintain homeostasis in order to survive
  • 5. Energy Use
    • Autotrophic
      • Organisms that make their own food that they will then convert to energy
      • Examples:
      • Photosynthesis:
    • Heterotrophic
      • Organisms that must take in food from an outside source
      • Examples
    Organisms obtain energy by one of two methods:
  • 6. Responding to stimuli
    • Organisms respond to a stimuli in order to maintain homeostasis
    • Senses : Making observations which lead to responses
    • Reflexes : Unconscious responses to stimuli
        • Blinking
  • 7. Responding to stimuli
    • Behaviors : Learned and instinctive responses to stimuli
      • Migration
      • Hibernation
      • Putting a coat on when it is cold
  • 8. Cells
    • Cells – basic units of structure and function for all living things
    • All organisms are made of one or more
  • 9. Unicellular vs Multicellular
    • Unicellular - Composed of just one cell . Must carry out all of life's functions. 
    • Multicellular- C onsist of more than one cell. H ave differentiated cells that perform specialized functions. Individual cells cannot survive on their own.
  • 10. Adaptations
    • In order for an organism to survive it must be able to adapt in response to the environment it is in.
    • Adaptations – changes made by an organism in response to the environment in order to survive.
    • Examples :
    • Evolution: change within a population of a certain species of organisms over a long period of time
  • 11. Reproduction
    • Asexual
      • One parent
      • Each organism is genetically identical
      • “ Fast and easy”
      • Budding & fission
    • Sexual
      • Requires two parents
      • Organisms genetically different
      • “ Slow and hard”
      • Sex cells from each gender join
    • Reproduction- process by which organisms produce offspring
  • 12. Growth & Development
    • Two ways an organism can grow in a multicellular organism:
      • Cell enlargement – each cell gets bigger (exp: muscle and fat cells)
      • Cell division (reproduction)- cells reproduce producing more cells
    • Development: Occurs when an organism, cells, or body tissues gain the ability to perform a certain task
      • Occurs by:
        • Cell Division
        • Cell Specialization: Each cell becomes different to perform its task
  • 13. Organized Molecules Cell Parts Cells Tissues Organs Organ system Organism Cellular Level – All organisms are at least organized to this level

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