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2014-01-10 18:50:49
Ch1 Exploring Life

Ch 1 definitions
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  1. biology
    the scientific study of life
  2. 7 properties of life
    • 1) order
    • 2) reproduction
    • 3) growth & development
    • 4) energy processing
    • 5) response to the environment
    • 6) regulation
    • 7) evolutionary adaption
  3. biosphere
    all the environments on Earth that support life, these include most regions of land, bodies of water, and the lower atmosphere
  4. ecosystem
    consists of all the organisms living in a particular area, as well as the physical components the organism interacts with such as air, soil, water and sunlight
  5. community
    the entire array of organisms in an ecosystem (plants, birds, snakes, insects, trees, fungi, microscopic protists and bacteria)
  6. population
    includes all the individuals of a particular species living in an area
  7. organism
    an individual living thing
  8. organ system
    • ex: circulatory system or nervous system
    • consists of several organs that cooperate in a specific function
    • organs of the nervous system: brain, spinal cord and the nerves
  9. organ
    made up of several different tissues
  10. tissue
    each made up of similar cells that perform a specific function
  11. cell
    the fundamental unit of life
  12. organelle
    a membrane-enclosed structure that performs a specific function in the cell
  13. molecule
    • a cluster of small chemical units called atoms held together by chemical bonds
    • ex: DNA (deoxyribonucleic acid) is the __?__ of inheritance