1.2 World of biology

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1.2 World of biology

• All organisms share certain characteristics
  (HERCOG)

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Characteristics

• 1. Cells basic unit of life
•     unicellular or multicellular
• 2. Organization
•      molecular and cellular
• 3. Energy use
• metabolism is all the chemical
  processes that occur in the organism
• 4. Homeostasis
• stable internal environment

• 5.  Growth
• grow by cell division and cell enlargement
•     cell division is the formation of
  2 cells from an existing cell
•       cell development is the process
  by which an adult organism arises through cell
  division and differentiation
• 6. Reproduction
• essential for continuation of a species but
  not an individual.

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Biodiversity

• Biological world is so diverse but many organisms
  have not been identified because they live deep
  in the rain forest or deep in the oceans.