What is life?. Characteristics of Living Things Cellular Organization Contain similar chemicals Use...
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![Page 1: What is life?. Characteristics of Living Things Cellular Organization Contain similar chemicals Use energy Grow and develop Reproduce Respond to their.](https://reader035.fdocuments.in/reader035/viewer/2022081507/5a4d1b777f8b9ab0599b797e/html5/thumbnails/1.jpg)
What is life?
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Characteristics of Living Things• Cellular Organization• Contain similar chemicals• Use energy• Grow and develop• Reproduce• Respond to their surroundings
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Cellular Organization
• All organisms (living things) are made of cells.
• A cell is the basic unit of structure and function in an organism.
• Organism can be unicellular (made of one cell) or multicellular (made of many cells)
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All living things contain similar chemicals• Carbohydrates (for energy)• Proteins • Lipids building material• Nucleic Acids (genetic material)
Where in our bodies do we store proteins & lipids? Where do we get them from?
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Energy use• All living things
use energy to grow, repair injuries, etc. • What else would
living things use energy for?
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Growth and Development• Growth: process of becoming larger• Development: process of change to produce a
more complex organism
• Both growth and development require energy
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Response to Surroundings• Stimulus: a change in the organisms
surroundings that causes the organism to react
• Response: how the organism reacts to a stimulus , an action or a change in behavior
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Reproduction• Living things produce offspring that are
similar to the parents
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What are the needs of living things?
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Needs of living things• Energy• Water• Living Space• Stable internal conditions
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Energy• There are two types of organisms:
• Autotrophs: organisms that make their own energy• “auto” = self, “troph” = feeder• Ex. Plants
• Heterotrophs: organisms that do not make their own energy• “hetero” = other• Ex. ??
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Water and Space• All organisms need both water and
space in order to survive.• Some organisms may compete for
space.
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Stable internal environment
• Homeostatis: maintenance of a stable internal environment despite changes in the surroundings• Ex. Sweating is done to try to maintain
the same body temperature
• What are some more examples of how organisms maintain homeostasis?
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Is it living or non-living??• Look at the pictures and determine
whether the object is living or non-living based on the characteristics of living things (cellular organization, composed of chemicals, energy use, growth and development, response, and reproduction)
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Types of Bacteria
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