Chapter%201%20Themes%20of%20Biology

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Chapter 1Themes of Biology

• What is Biology?
• Bio means life logos means the study of
• What are other subjects that end in the suffix
  logy? What are their meanings?

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Living Things Have Certain Characteristics in
Common

• Cellular Organization- All living things are made
  of one (unicellular) or more (multicellular)
  cells. Cells are the smallest unit capable of all
  life functions.
• Your body contains more than 100 trillion cells!

Single-celled organism Called a Paramecium
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• 2. Reproduction- All living things can reproduce.
  A species must be able to produce more organisms
  like themselves to continue.

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• 3. Living things obtain and use materials and
  energy.
• Metabolism- All of the chemical reactions carried
  out in an organism to produce energy.
• Almost all the energy used by living organisms is
  captured from sunlight.

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• 4. Living things maintain a stable internal
  environment.
• Homeostasis- The ability to stay the same on the
  inside despite of changes in the surrounding
  environment.
• How do humans maintain a constant body
  temperature?

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• 5. Living things are based on a universal genetic
  code.
• Heredity- The passing of traits from parent to
  offspring. Heredity explains why children tend to
  resemble their parents.

Widows peak
Hitchhikers thumb
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• 6. As a group, living things change over time.
• Evolution- Change in traits of species over time.
  Charles Darwin, British naturalist, defined the
  process in which organisms with favorable genes
  are more likely to survive reproduce (natural
  selection).

Galapagos Islands
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• 7. Living things respond to their environment.
  Organisms detect and respond to stimuli from
  their environment.

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• 8. Growth Development Every organism has a
  particular pattern of growth and development.