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Characteristics of Living Things - PowerPoint PPT Presentation


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Characteristics of Living Things. What is biology?. The study of living things All living things share certain characteristics. 1. Made of 1 or more cells. Unicellular (one cell) - ex. Bacteria Multicellular (many cells) - ex. Animals, plants. 2. Need energy to survive.

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Presentation Transcript
what is biology
What is biology?
  • The study of living things
  • All living things share certain characteristics
1 made of 1 or more cells
1. Made of 1 or more cells
  • Unicellular (one cell)

- ex. Bacteria

  • Multicellular (many cells)

- ex. Animals, plants

2 need energy to survive
2. Need energy to survive
  • Autotrophs - get energy from sun
  • Heterotrophs - get energy by consuming nutrients from their environment
3 respond to stimuli in their environment
3. Respond to stimuli in their environment
  • Stimuli - factors in the environment that living things react to

(ex. Light, temperature, sound, etc.)

4 all living things reproduce
4. All living things reproduce
  • Sexual - two sex cells required (sperm and egg)
  • Asexual - only one parent cell is needed
5 grow and develop
5. Grow and develop
  • Each cell divides to make new cells (cell division) – results in growth
  • Some cells become specialized and perform different jobs than others (differentiation)
6 maintain homeostasis
6. Maintain homeostasis
  • Homeostasis – a relatively stable internal environment (within a certain range)

- (ex. Human body temperature (approximately 98.6 degrees F))

7 have a universal genetic code
7. Have a universal genetic code
  • All living things have DNA
  • DNA passes on genetic information from one generation to the next
8 adapt and evolve over time
8. Adapt and evolve over time
  • Evolution - gradual change in a populationof organisms over time
  • Individuals DO NOT evolve