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1.5 Characteristics of Life

1.5 Characteristics of Life. Unity in Diversity. 1. ORDER. All organisms exhibit complex organization. 2. Regulation. The environment outside an organism may change markedly, but regulatory mechanisms maintain an organisms’ internal environments within limits that sustain life.

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1.5 Characteristics of Life

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  1. 1.5 Characteristics of Life Unity in Diversity

  2. 1. ORDER • All organisms exhibit complex organization

  3. 2. Regulation • The environment outside an organism may change markedly, but regulatory mechanisms maintain an organisms’ internal environments within limits that sustain life.

  4. homeostasis   • The ability to maintain a relatively constant internal environment. • EXAMPLES: body temp. • Blood sugar levels • Water levels • pH

  5. Kidney used for water regulation Gets rid of wastes

  6. 3. Growth and development • Each organism has a pattern of growth and development characteristic of its species.

  7. 4. Energy Utilization • Organisms take in energy and transform it to perform all of life’s activities. -metabolism -photosynthesis

  8. 5. Response to the environment Eye spot (responds to light) • All organisms respond to environmental stimuli.

  9. I’m outa here!

  10. 6. Reproduction • DNA lends itself to precise replication, and all organisms reproduce their own kind.

  11. 7. Evolution • Reproduction underlies the capacity of species to change (evolve) over time.

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