May 1, 2016

Biology: Living Things

CHARACTERISTICS OF LIVING THINGS

  1. Made of cells 
    • unicellular-single-celled organisms (bacteria)
    • multicellular composed of many cells
  2. Cells are composed of chemicals:
    • water
    • carbohydrates - energy source
    • protein - building materials
    • lipids - building materials
    • nudeic acids - genetic material
  3. Use energy for growth and repair
  4. Grow and develop
  5. Respond to their surroundings:
    • stimulus - changes in an organism's surroundings that causes the organism to react
    • response - an action or change in behavior
  6. The ability to reproduce or produce offspring that are similar to the parents
My sister, Ania, made this.


THE NEEDS OF LIVING THINGS

  1. Energy
    • food is a source of energy 
    • plants are autotrophs - they make their own food - by capturing sun's  energy and using it with carbon dioxide
    • heterotrophs - can't make their own food they obtain energy by eating autotrophs or other heterotrophs. Animals are heterotrophs.
  2. Water
    • it's needed to obtain chemicals from surroundings
    • break up food 
    • grow
    • move substances within the body
    • reproduce
  3. Living space
    • a place to get food and water and find shelter
  4. Stable internal conditions (homeostasis)

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