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1.3 Ten themes unify the study of life. Mrs. Kerstetter Biology. Biological Systems. System = a complex organization formed from a combination of smaller parts Has properties based on the arrangement and interaction of its parts Examples: Your body! Ecosystem. Cellular Basis of Life.

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biological systems
Biological Systems
  • System= a complex organization formed from a combination of smaller parts
    • Has properties based on the arrangement and interaction of its parts
    • Examples:
      • Your body!
      • Ecosystem
cellular basis of life
Cellular Basis of Life
  • All organisms are made of cells
  • Most multicellular organisms have cells that are specialized for different functions
    • What does specialized mean?
  • Most multicellular organisms have higher levels of organization
    • Interaction of cells determines development and survival

Celltissueorgansystemorganism

form and function
Form and Function
  • How something works is related to its structure
      • AKA “form fits function”
  • What are some examples in nature where “form fits function?”
reproduction and inheritance
Reproduction and Inheritance
  • “Like begets like”
    • Organisms reproduce their own kind
  • Genes (units of genetic information) are responsible for family inheritance
  • Genes are made of DNA
    • Each cell contains copy of ALL DNA in your genome
    • Inherited info in the form of DNA enables organisms to reproduce their own kind
interaction with the environment
Interaction with the Environment
  • Each organisms interacts continuously with its environment
  • Imp in an ecosystem (of which we are a part!)
    • Transfer of chemicals b/w organisms and the environments
    • React to environmental stimuli
energy and life
Energy and Life
  • Energy is needed in chemical form
    • Carbohydrates, lipids, etc.
  • Ecosystem
regulation
Regulation
  • Homeostasis= regulation of internal conditions
  • Examples?
adaptation and evolution
Adaptation and Evolution
  • Adaptation= an inherited trait that helps an organism’s ability to survive and reproduce
  • Population= localized group of organisms of the same species
  • Natural selection= individuals with beneficial variations may live longer and produce more offspring than those that don’t
  • Evolution= generation-to-generation change in the proportion of different inherited genes in a population
biology and society
Biology and Society
  • DNA
  • Medicine
  • Agriculture
  • Pharmaceuticals
  • Environmental issues
  • Genetics
scientific inquiry
Scientific Inquiry

=asking questions about nature

=using observations or experiments to to find possible answers