11 themes of Biology

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1-1 themes of Biology
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The study of life

• 3.5 billion years ago first life appeared on
  earth
• Single celled organisms too small to see without
  a microscope
• Biology - the study of life, studies all living
  things on earth.

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6 unifying themes

• Cell structure and function
• Stability and homeostasis
• Reproduction and inheritance
• Evolution
• Interdependence of organisms
• Matter energy and organization

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Cell Structure and function

• Single celled organisms are unicellular Uni
  1 cellular cell
• Most organisms that you can see are
  multicellular.
• Cells are very organized, having specialized
  structures to carry out life processes.
• Differentiation - cells in multicellular
  organisms become different from other cells to
  carry out specific jobs within the organism.

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Stablility and Homeostasis

• Cells need specific environments to live and
  prosper.
• Cells are able to control their internal
  environments.
• Homeostasis is the ability to maintain stable
  internal conditiopns

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Reproduction and inheritance

• Reproduction is making new organism like the
  originals.
• DNA is the molecule that stores the information
  that makes an organism what it is.
• Sexual reproduction creates new organisms that
  are slightly different than either parent.
• Asexual reproduction produces an exact copy of
  the parent organism.

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Evolution

• Populations of organisms evolve over time
• Natural selection is considered the driving force
  of evolution.
• Natural selection states that only the strongest
  and most fit organisms survive and reproduce.

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Interdependence of organisms

• Ecology is the study of interactions of species
  with each other and with their environment.
• Ecosystems or environmental communities are
  examples of these interactions
• Many species are dependent on one another for
  food, shelter, etc.

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Matter, Energy, and Organization

• All living things are very organized and require
  energy to stay very organized.
• Autotrophs take energy from the sun to make their
  own food.
• Heterotrophs consume other organisms for food and
  enrgy.