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What is Life?

What is Life?. Vocabulary. Organisms homeostasis cell spontaneous generation unicellular autotrophs multicellular development stimulus response heterotrophs reproduce controlled experiment Manipulated variable.

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What is Life?

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  1. What is Life?

  2. Vocabulary Organisms homeostasiscell spontaneous generation unicellular autotrophsmulticellular developmentstimulus responseheterotrophs reproducecontrolled experimentManipulated variable

  3. Remembering the 6 characteristics of Living thingsCats—Cells Can—Chemicals of lifeEat—Energy Green—Growth and DevelopmentRusty—Reproduction Rats—Response to stimulus

  4. CELLS • Basic unit of structure and function in living things. • Cells come from other cells • Unicellular – single cells (microscopic) • Multicellular – many cells (larger in size)

  5. Chemical of life • Most abundant chemical in cells is water. • Carbohydrates – cell’s energy source • Proteins and Lipids – building materials • Nucleic Acids – genetic material

  6. Energy Use • Cells of organisms use energy to grow and repair injured parts.

  7. Growth and development • Growth – a process of becoming larger • Development – the process of change that occurs during an organism's life to produce a more complex organism.

  8. Response to surroundings • Stimulus – a change in an organism’s surroundings that causes the organism to react.

  9. REPRODUCTION • Reproduce – to produce offspring that are similar to their parents.

  10. Spontaneous generation • Mistaken identity that living things arise from nonliving sources. • Redi’s experiment was a controlled experiment. 1. Meat in 2 identical jars – one covered, one not covered. 2. Maggots appear on the meat in the open jar. 3. Concluded that flies layed eggs on meat they hatched resulting in maggots.

  11. Remembering the 4 needs of living things:Every—energy Woman—Water Loves—Living spaceHershey’s—Homeostasis

  12. Energy • They use food as a source of energy • Autotroph – means “self feeder” Use food they make as an energy source • Heterotroph – means “other feeder” Eat autotrophs and obtain the energy in the autotrophs stored food.

  13. WATER • Water helps the cell obtain chemicals, break down food, grow, move substances within their bodies, and reproduce. • 92% of the liquid part of your blood

  14. LIVING SPACE • A place to get food, water, and shelter. • Plants have a fixed space and their branches, leaves compete for space. Roots compete for water and minerals. • Animals move about competing or sharing living space.

  15. HOMEOSTASIS • Maintenance of stable internal conditions despite changes in the surroundings. i.e. your body temperature

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