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Characteristics of Organisms

Characteristics of Organisms. 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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Characteristics of Organisms

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  1. Characteristics of Organisms

  2. What is biology? • The study of living things • All living things share certain characteristics

  3. 1. Made of 1 or more cells • Unicellular (one cell) - ex. Bacteria • Multicellular (many cells) - ex. Animals, plants

  4. 2. Need energy to survive • Autotrophs - get energy from sun • Heterotrophs - get energy by consuming nutrients from their environment

  5. 3. Respond to stimuli in their environment • Stimuli - factors in the environment that living things react to (ex. Light, temperature, sound, etc.)

  6. 4. All living things reproduce • Sexual - two sex cells required (sperm and egg) • Asexual - only one parent cell is needed

  7. 5. Grow and Develop • Each cell divides to make new cells (cell division) – results in growth • To progress from earlier to later stages of a life cycle:----Caterpillars develop into butterflies.

  8. 6. Maintain homeostasis • Homeostasis – a relatively stable internal environment (within a certain range) - (ex. Human body temperature (approximately 98.6 degrees F))

  9. 7. Adapt and evolve over time • Evolution - gradual change in a populationof organisms over time • Individuals DO NOT evolve

  10. 8. Have a universal genetic code • All living things have DNA • DNA passes on genetic information from one generation to the next

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