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Characteristics of Living Things
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All Living Things Share Common Characteristics
What do you think are characteristics that make something living?
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Living Things Are Made Up of Cells
Smallest living unit Unicellular/Multicellular Complex, highly organized
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Based on Universal Genetic Code
Stores info needed to live, grow and reproduce in DNA Info copied passed on to offspring Almost identical in every organism on Earth
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Living Things Reproduce
Sexual Reproduction Sex cells from 2 parents unite (plant/animal) Asexual Reproduction Single organism produces clone of itself (bacteria)
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Growth and Development
Cells begin to differentiate Look different Perform different functions
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Maintain Stable Environment
Keep internal environment stable even though external conditions change Homeostasis
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Respond to Their Environment
Detect and respond to signals (stimulus) from their environment
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Obtain and Use Material/Energy
Energy needed to grow, develop, function and reproduce Metabolism- sum of all chemical reactions in an organism SUN is main source for all life 6O2 + C6H12O CO2 + 6H2O
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Taken as a Group, Living Things Evolve
Change over time Links all life forms to common origin Evidence found in living/fossil organisms DNA
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LIFE IS ORGANIZED ON MANY LEVELS
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Atoms Molecules Organelles Cells – life starts here Tissues Organs System Organism Population Community Ecosystem Biosphere
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